{"title":"Supra","description":"","products":[{"product_id":"supra-mm-soft-natural-bristle-brushes-3-4-thick-double-row-3-32-shank-pack-3","title":"Pack-3 Supra MM Soft 3\/4\" Thick Double Row Natural Bristle Brushes Mounted On 3\/32\" Shanks","description":"\u003cp\u003eSupra MM Thick Double Row 3\/4\" Soft Natural Bristle Brushes deliver premium performance for polishing flat, curved, small, and hard-to-reach surfaces. Made in the USA with solid steel ring construction, these brushes are built for durability and consistent results in professional jewelry and metalsmithing applications.\u003c\/p\u003e\u003cp\u003eBrush filaments are permanently anchored in the solid steel ring and uniformly distributed for even wear across the entire brush face. The natural animal hair bristles provide a soft, controlled action ideal for detail work and delicate surface finishing. Mounted on 3\/32\" diameter shanks for compatibility with standard flex shaft handpieces and rotary tools.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePremium soft natural animal hair bristles\u003c\/li\u003e\n\u003cli\u003eDouble row, 3\/4\" thick brush profile for increased surface contact\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored in solid steel ring construction\u003c\/li\u003e\n\u003cli\u003eUniformly distributed bristles for even wear and consistent performance\u003c\/li\u003e\n\u003cli\u003eEffective on flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eMounted on 3\/32\" diameter shanks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eSoft natural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Style\u003c\/th\u003e\n\u003ctd\u003eDouble row\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Thickness\u003c\/th\u003e\n\u003ctd\u003e3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Diameter\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eSolid steel ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e3 brushes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3 soft natural bristle brushes mounted on 3\/32\" shanks\u003c\/li\u003e\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584321945814,"sku":"116.611","price":21.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-3-supra-mm-soft-34-thick-double-row-natural-bristle-brushes-mounted-on-332-shanks-otto-frei.jpg?v=1719956275"},{"product_id":"supra-mm-stiff-natural-bristle-brushes-3-4-thick-double-row-3-32-shank-3-pack","title":"Pack-3 Supra MM Stiff 3\/4\" Thick Double Row Natural Bristle Brushes-Mounted On 3\/32\" Shanks","description":"\u003cp\u003eThe Supra MM Stiff 3\/4\" Thick Double Row Natural Bristle Brushes deliver premium performance for polishing and finishing across a wide range of surfaces. Mounted on 3\/32\" diameter shanks, these brushes are \u003cstrong\u003eMade in the USA\u003c\/strong\u003e with solid steel ring construction engineered for lasting durability. Brush filaments are permanently anchored in the solid steel ring and uniformly distributed, ensuring consistent, even wear throughout the life of the brush.\u003c\/p\u003e\u003cp\u003eThe double row, 3\/4\" thick stiff bristle configuration makes these brushes exceptionally effective on flat, curved, small, and hard-to-reach surfaces — ideal for professional jewelers and metalsmiths who need reliable access to intricate areas. Made with natural animal hair, these brushes offer the classic performance characteristics that professionals trust for polishing and finishing work.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePremium stiff natural animal hair bristles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA\u003c\/strong\u003e with solid steel ring construction\u003c\/li\u003e\n\u003cli\u003eBrush filaments permanently anchored in the solid steel ring for durability\u003c\/li\u003e\n\u003cli\u003eUniformly distributed filaments for even wear\u003c\/li\u003e\n\u003cli\u003eDouble row, 3\/4\" thick brush profile\u003c\/li\u003e\n\u003cli\u003eEffective on flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMounted on 3\/32\" diameter shanks\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eStiff natural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Thickness\u003c\/th\u003e\n\u003ctd\u003e3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRow Configuration\u003c\/th\u003e\n\u003ctd\u003eDouble row\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Diameter\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eSolid steel ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e3 brushes per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3 Supra MM Stiff 3\/4\" Thick Double Row Natural Bristle Brushes mounted on 3\/32\" shanks\u003c\/li\u003e\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584323682518,"sku":"116.613","price":14.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-3-supra-mm-stiff-34-thick-double-row-natural-bristle-brushes-mounted-on-332-shanks-otto-frei.jpg?v=1719956272"},{"product_id":"supra-mm-stiff-natural-bristle-brushes-9-16-thin-single-row-3-32-shank-pack-12","title":"Pack-12 Supra MM Stiff 9\/16\" Thin Single Row Natural Bristle Brushes-Mounted On 3\/32\" Shanks","description":"\u003cp\u003eThe \u003cstrong\u003eSupra MM Thin Single Row Natural Bristle Brushes\u003c\/strong\u003e are a premium choice for jewelers and metalsmiths who need precise, controlled finishing on intricate or hard-to-reach surfaces. At \u003cstrong\u003e9\/16\" in diameter\u003c\/strong\u003e, these miniature radial brushes are designed for flat, curved, small, and recessed areas where larger tools simply cannot reach. The stiff natural animal hair bristles provide aggressive action, making them well suited for cleaning, polishing, and finishing tasks that demand durability and consistent results.\u003c\/p\u003e\u003cp\u003eConstructed with a \u003cstrong\u003esolid steel ring\u003c\/strong\u003e, these brushes are built to last. The radial brush filaments are permanently anchored in the ring and uniformly distributed, ensuring even wear across the entire brush face and a consistent finish throughout the tool's lifespan. Mounted on a \u003cstrong\u003e3\/32\" shank\u003c\/strong\u003e, they are compatible with standard flex shaft machines and rotary handpieces. Manufactured in the USA and rated up to \u003cstrong\u003e25,000 RPM\u003c\/strong\u003e, these brushes combine professional-grade construction with reliable performance.\u003c\/p\u003e\u003cp\u003eSold in packs of 12, these brushes offer excellent value for busy bench jewelers who rely on consistent, high-quality consumables.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eThin single-row radial design targets flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eStiff natural animal hair bristles for aggressive finishing and cleaning action\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for enhanced durability and long tool life\u003c\/li\u003e\n\u003cli\u003eRadial filaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003eMounted on a 3\/32\" shank for use with standard flex shaft machines and rotary handpieces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eSold by the dozen (pack of 12)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e9\/16\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Size\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStiffness\u003c\/th\u003e\n\u003ctd\u003eStiff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRow Configuration\u003c\/th\u003e\n\u003ctd\u003eThin single row\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e12 Supra MM Stiff 9\/16\" Thin Single Row Natural Bristle Brushes mounted on 3\/32\" shanks\u003c\/li\u003e\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584324501718,"sku":"116.602","price":14.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mm-stiff-916-thin-single-row-natural-bristle-brushes-mounted-on-332-shanks-otto-frei.jpg?v=1719956272"},{"product_id":"supra-mm-soft-natural-bristle-brushes-9-16-single-row-3-32-shank-pack-12","title":"Pack-12 Supra MM Soft 9\/16\" Thin Single Row Natural Bristle Brushes Mounted On 3\/32\" Shanks","description":"\u003cp\u003eThe Supra MM Thin Single Row Natural Bristle Brushes deliver premium performance for polishing and finishing on flat, curved, small, and hard-to-reach surfaces. Crafted with natural animal hair filaments, these miniature brushes are permanently anchored in a solid steel ring construction for lasting durability and even wear across the brush's full service life. Uniformly distributed bristles ensure consistent contact and predictable results on delicate or intricate workpieces.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium natural animal hair bristle filaments\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for strength and durability\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003eThin single-row profile reaches flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eSoft flexibility for gentle polishing and finishing applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e9\/16\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Size\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStiffness\u003c\/th\u003e\n\u003ctd\u003eSoft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRow Configuration\u003c\/th\u003e\n\u003ctd\u003eThin single row\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e12 (sold by the dozen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e12 Supra MM Soft Thin Single Row 9\/16\" Natural Bristle Brushes with 3\/32\" shanks\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584326172886,"sku":"116.603","price":21.85,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mm-soft-916-thin-single-row-natural-bristle-brushes-mounted-on-332-shanks-otto-frei.jpg?v=1719956272"},{"product_id":"supra-mm-soft-natural-bristle-cup-brushes-9-16-diameter-3-32-shank-pack-3","title":"Pack-3 Supra MM Soft 1\/4\" Trim Natural Bristle Cup Brushes 9\/16\" Diameter Mounted on 3\/32\" Shanks","description":"\u003cp\u003eThe Supra MM Soft Natural Bristle Cup Brushes deliver premium finishing performance for jewelers and metalsmiths working on flat, curved, small, and hard-to-reach surfaces. Constructed with a solid steel ring, these miniature cup brushes are built for durability and consistent results. Brush filaments are permanently anchored in the solid steel ring and uniformly distributed to ensure even wear throughout the life of the brush.\u003c\/p\u003e\u003cp\u003eMade with natural animal hair, these brushes offer a soft touch ideal for delicate polishing and finishing applications. Available in both Soft and Stiff configurations, the MM series represents a top-tier option among natural bristle brushes on the market.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePremium natural animal hair bristles for soft, controlled finishing\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for long-lasting durability\u003c\/li\u003e\n\u003cli\u003eBrush filaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003eSuited for flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eMaximum operating speed: 25,000 rpm\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eTrim\u003c\/th\u003e\n\u003ctd\u003e1\/4\" Soft Natural Bristle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCup Diameter\u003c\/th\u003e\n\u003ctd\u003e9\/16\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Size\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Material\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 rpm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e3 brushes per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3 natural bristle cup brushes per pack\u003c\/li\u003e\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584342294742,"sku":"116.753","price":14.45,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-3-supra-mm-soft-14-trim-natural-bristle-cup-brushes-916-diameter-mounted-on-332-shanks-otto-frei.jpg?v=1719956263"},{"product_id":"supra-mm-stiff-natural-bristle-cup-brushes-9-16-diameter-1-4-trim-3-32-shank-pack-6","title":"Pack-6 Supra MM Stiff 1\/4\" Trim Natural Bristle Cup Brushes 9\/16\" Diameter Mounted on 3\/32\" Shanks","description":"\u003cp\u003eSupra MM Stiff Natural Bristle Cup Brushes deliver premium performance for jewelers and metalsmiths working on flat, curved, small, and hard-to-reach surfaces. At 9\/16\" in diameter with a 1\/4\" trim length and mounted on 3\/32\" shanks, these miniature cup brushes are purpose-built for fine detail finishing and polishing work.\u003c\/p\u003e\n\u003cp\u003eCrafted from natural animal hair, the bristle filaments are permanently anchored in a solid steel ring and uniformly distributed for consistent, even wear throughout the life of the brush. Available in both Soft and Stiff grades, this listing features the \u003cstrong\u003eStiff\u003c\/strong\u003e version for more aggressive finishing action. These brushes are \u003cstrong\u003emade in the USA\u003c\/strong\u003e with solid steel ring construction engineered for lasting durability under regular professional use.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNatural animal hair bristles for effective polishing and finishing\u003c\/li\u003e\n\u003cli\u003eStiff bristle grade for more aggressive surface action\u003c\/li\u003e\n\u003cli\u003ePermanently anchored filaments in a solid steel ring for secure, long-lasting performance\u003c\/li\u003e\n\u003cli\u003eUniformly distributed bristles for even wear and consistent results\u003c\/li\u003e\n\u003cli\u003eIdeal for flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA with solid steel ring construction\u003c\/li\u003e\n\u003cli\u003eCompatible with standard flex-shaft handpieces and rotary tools accepting 3\/32\" shanks\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Material\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Grade\u003c\/th\u003e\n\u003ctd\u003eStiff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCup Diameter\u003c\/th\u003e\n\u003ctd\u003e9\/16\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTrim Length\u003c\/th\u003e\n\u003ctd\u003e1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Size\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e6\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e6 Supra MM Stiff Natural Bristle Cup Brushes (9\/16\" diameter, 3\/32\" shank)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584343376086,"sku":"116.755","price":25.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/116.755NEW_thumb_5414ef5c-1bcd-46f0-bec4-32ca592b5c16.jpg?v=1744745950"},{"product_id":"supra-me-soft-natural-bristle-end-brushes-1-4-trim-3-32-shank-3-pack","title":"Pack-3 Supra ME Soft 1\/4\" Trim Natural Bristle End Brushes-Mounted on 3\/32\" Shanks","description":"\u003cp\u003eThe Supra ME Soft Natural Bristle End Brushes deliver premium performance for detail polishing and finishing on flat, curved, small, and hard-to-reach surfaces. Featuring a \u003cstrong\u003e1\/4\" trim length\u003c\/strong\u003e and mounted on \u003cstrong\u003e3\/32\" shanks\u003c\/strong\u003e, these miniature brushes are engineered for precision work where control and consistency matter. Natural animal hair filaments are permanently anchored in a solid steel ring construction, ensuring uniform bristle distribution for even, predictable wear over the life of the brush.\u003c\/p\u003e\n\u003cp\u003eAvailable in soft and stiff versions, these brushes are \u003cstrong\u003emade in the USA\u003c\/strong\u003e and built to professional standards. Each pack contains 3 brushes, making them an economical choice for bench jewelers, metalsmiths, and finishing technicians who rely on consistent results.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eNatural animal hair bristles for gentle, effective surface finishing\u003c\/li\u003e\n\u003cli\u003ePermanently anchored filaments in a solid steel ring for lasting durability\u003c\/li\u003e\n\u003cli\u003eUniformly distributed bristles for even wear and consistent results\u003c\/li\u003e\n\u003cli\u003eIdeal for flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eSoft trim variety for delicate finishing applications\u003c\/li\u003e\n\u003cli\u003eMade in the USA with solid steel ring construction\u003c\/li\u003e\n\u003cli\u003eSold in convenient packs of 3\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eTrim Length\u003c\/th\u003e\n\u003ctd\u003e1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Diameter\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStiffness\u003c\/th\u003e\n\u003ctd\u003eSoft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e3 brushes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e3 × Supra ME Soft 1\/4\" Trim Natural Bristle End Brushes mounted on 3\/32\" shanks\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584343933142,"sku":"116.700","price":12.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-3-supra-me-soft-14-trim-natural-bristle-end-brushes-mounted-on-332-shanks-otto-frei.jpg?v=1719956260"},{"product_id":"supra-me-stiff-natural-bristle-end-brushes-half-inch-trim-3-32-shank-pack-12","title":"Pack-12 Supra ME Stiff 1\/2\" Trim Natural Bristle End Brushes-Mounted on 3\/32\" Shanks","description":"\u003cp\u003eThe Supra ME Stiff 1\/2\" Trim Natural Bristle End Brushes deliver professional-grade performance for detailed polishing and finishing work. These miniature end brushes are recognized as a premium natural thin-bristle option, built with solid steel ring construction for lasting durability. Brush filaments are permanently anchored in the solid steel ring and uniformly distributed to ensure consistent, even wear throughout the life of the brush.\u003c\/p\u003e\u003cp\u003eMade in the USA with natural animal hair, these stiff-bristle brushes are ideal for working on flat, curved, small, and hard-to-reach surfaces with precision. Mounted on 3\/32\" shanks, they are compatible with standard flex-shaft handpieces and similar rotary tools used in jewelry making and metalsmithing.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePremium natural thin bristle construction\u003c\/li\u003e\n\u003cli\u003eStiff bristle configuration for aggressive surface contact\u003c\/li\u003e\n\u003cli\u003e1\/2\" trim length for controlled reach\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for durability\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored in the steel ring\u003c\/li\u003e\n\u003cli\u003eUniformly distributed bristles for even wear\u003c\/li\u003e\n\u003cli\u003eSuited for flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMounted on 3\/32\" shanks for standard rotary tool compatibility\u003c\/li\u003e\n\u003cli\u003eMade in the USA with natural animal hair\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Material\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Stiffness\u003c\/th\u003e\n\u003ctd\u003eStiff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTrim Length\u003c\/th\u003e\n\u003ctd\u003e1\/2\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Size\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e12 Supra ME Stiff 1\/2\" Trim Natural Bristle End Brushes mounted on 3\/32\" shanks\u003c\/li\u003e\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584345669846,"sku":"116.711","price":20.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-me-stiff-12-trim-natural-bristle-end-brushes-mounted-on-332-shanks-otto-frei.jpg?v=1719956255"},{"product_id":"supra-mk-5-8-soft-natural-bristle-brushes-unmounted-1-8-hole-pack-12","title":"Pack-12 Supra MK 5\/8\" Soft Natural Bristle Brushes-Unmounted With 1\/8\" Hole","description":"\u003cp\u003e\u003cstrong\u003eSupra MK 5\/8\" Soft Natural Bristle Brushes\u003c\/strong\u003e are premium unmounted miniature brushes designed for professional jewelers and metalsmiths who demand consistent, reliable performance in fine finishing work. These brushes are made in the USA with solid steel ring construction, ensuring long-lasting durability through repeated use. Brush filaments are permanently anchored in the solid steel ring and uniformly distributed for even, predictable wear across the entire brush face.\u003c\/p\u003e\u003cp\u003eThe soft natural animal hair bristles are ideal for polishing flat, curved, small, and hard-to-reach surfaces where larger brushes cannot perform effectively. The 5\/8\" diameter provides excellent coverage for detailed work, and the unmounted design allows for flexible use with compatible hub adapters and screw mandrels.\u003c\/p\u003e\u003cp\u003eEach brush features a 1\/8\" diameter center hole for use with hub adapters or screw mandrels fitted with 1\/8\" diameter screws. \u003cem\u003eNote: Using these brushes with 3\/32\" diameter screw mandrels will result in a loose, sloppy fit.\u003c\/em\u003e If you require 3\/32\" hole brushes, those are also available separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e\u003cem\u003eSold by the dozen.\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSupra does not manufacture extra soft bristle brushes. Extra soft bristle brushes are produced in China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMade in the USA with solid steel ring construction\u003c\/li\u003e\n\u003cli\u003eSoft natural animal hair bristles for gentle, even finishing\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored in the steel ring for uniform distribution and consistent wear\u003c\/li\u003e\n\u003cli\u003eEffective on flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003e1\/8\" center hole for use with compatible hub adapters and 1\/8\" screw mandrels\u003c\/li\u003e\n\u003cli\u003eUnmounted design for flexible mandrel-based use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e5\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStiffness\u003c\/th\u003e\n\u003ctd\u003eSoft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCenter Hole Diameter\u003c\/th\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting Style\u003c\/th\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e12 (sold by the dozen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eThe 1\/8\" center hole is compatible with hub adapters \u003cstrong\u003e147.257\u003c\/strong\u003e or \u003cstrong\u003e147.259\u003c\/strong\u003e, and screw mandrels with 1\/8\" diameter screws such as \u003cstrong\u003e143.160\u003c\/strong\u003e or \u003cstrong\u003e143.162\u003c\/strong\u003e. These brushes are \u003cem\u003enot\u003c\/em\u003e recommended for use with 3\/32\" diameter screw mandrels, as the larger hole will produce an unstable fit.\u003c\/p\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584374603990,"sku":"116.647","price":21.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mk-58-soft-natural-bristle-brushes-unmounted-with-18-hole-otto-frei.jpg?v=1719956245"},{"product_id":"supra-mk-medium-natural-bristle-brushes-5-8-1-8-hole-pack-12","title":"Pack-12 Supra MK Medium 5\/8\" Natural Bristle Brushes-Unmounted With 1\/8\" Hole","description":"\u003cp\u003e\u003cstrong\u003eSupra MK 5\/8\" Medium Natural Bristle Brushes\u003c\/strong\u003e are premium unmounted miniature brushes designed for professional jewelers and metalsmiths who demand consistent, even performance on delicate finishing work. These brushes are \u003cstrong\u003emade in the USA\u003c\/strong\u003e with solid steel ring construction for exceptional durability and long service life.\u003c\/p\u003e\u003cp\u003eBrush filaments are made from natural animal hair and are permanently anchored in the solid steel ring, then uniformly distributed to ensure even wear across the bristle face. This construction makes them especially effective on flat, curved, small, and hard-to-reach surfaces where consistent contact is critical.\u003c\/p\u003e\u003cp\u003eSupra MK brushes are available in Soft, Medium, and Stiff formulations — this listing is for the \u003cstrong\u003eMedium\u003c\/strong\u003e bristle. Note that Supra does not manufacture an extra soft version; extra soft bristle brushes are produced in China and are a separate product entirely.\u003c\/p\u003e\u003cp\u003eThese brushes feature a \u003cstrong\u003e1\/8\" diameter center hole\u003c\/strong\u003e for use with hub adapters or screw mandrels fitted with the correct 1\/8\" diameter screws. Using a 3\/32\" diameter screw mandrel with this hole size will result in a loose, imprecise fit — use the appropriate 1\/8\" hardware for best results. Otto Frei also carries natural bristle brushes with 3\/32\" diameter holes if that shank size is preferred.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSold by the dozen (pack of 12).\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePremium natural animal hair bristles for professional finishing\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for durability and consistent bristle retention\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003eEffective on flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMedium bristle stiffness for versatile polishing and finishing applications\u003c\/li\u003e\n\u003cli\u003e1\/8\" center hole compatible with appropriate hub adapters and screw mandrels\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e5\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Stiffness\u003c\/th\u003e\n\u003ctd\u003eMedium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCenter Hole Diameter\u003c\/th\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMount Type\u003c\/th\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003ePack of 12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eCompatible hub adapters: 147.257 or 147.259 (sold separately).\u003c\/li\u003e\n\u003cli\u003eCompatible screw mandrels require 1\/8\" diameter screws: 143.160 or 143.162 (sold separately).\u003c\/li\u003e\n\u003cli\u003eDo not use with 3\/32\" diameter screw mandrels — the fit will be imprecise.\u003c\/li\u003e\n\u003cli\u003eNatural bristle brushes with 3\/32\" holes are available separately from Otto Frei.\u003c\/li\u003e\n\u003cli\u003eSupra does not manufacture extra soft bristle brushes; extra soft versions are produced in China.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584375062742,"sku":"116.648","price":21.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mk-medium-58-natural-bristle-brushes-unmounted-with-18-hole-otto-frei.jpg?v=1719956245"},{"product_id":"supra-mk-3-4-soft-natural-bristle-brushes-unmounted-1-8-hole-pack-12","title":"Pack-12 Supra MK 3\/4\" Soft Natural Brushes-Unmounted With 1\/8\" Hole","description":"\u003cp\u003eThe Supra MK 3\/4\" Soft unmounted natural bristle brushes deliver premium performance for jewelers and metalsmiths working on flat, curved, small, and hard-to-reach surfaces. Made in the USA with solid steel ring construction, these miniature brushes are built for durability and consistent results. Brush filaments are permanently anchored in the solid steel ring and uniformly distributed for even wear across the working surface.\u003c\/p\u003e\u003cp\u003eThese brushes are made with natural animal hair and are available in Soft, Medium, and Stiff bristle grades to match your application requirements. The 1\/8\" diameter center hole is designed for use with specific hub adapters and screw mandrels—see the Notes section for important compatibility guidance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSold by the dozen.\u003c\/strong\u003e\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePremium natural animal hair bristles—Soft grade\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for long-lasting durability\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003eSuitable for flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eUnmounted design with 1\/8\" center hole\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Grade\u003c\/th\u003e\n\u003ctd\u003eSoft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHole Diameter\u003c\/th\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eSolid steel ring, unmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e12 (one dozen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThe 1\/8\" center hole is designed for use with hub adapters \u003cstrong\u003e147.257\u003c\/strong\u003e or \u003cstrong\u003e147.259\u003c\/strong\u003e, or with screw mandrels using 1\/8\" diameter screws \u003cstrong\u003e143.160\u003c\/strong\u003e or \u003cstrong\u003e143.162\u003c\/strong\u003e. \u003cem\u003eUsing this hole size with thinner 3\/32\" diameter screw mandrels results in a sloppy fit.\u003c\/em\u003e Natural bristle brushes with 3\/32\" diameter holes are also available separately.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eSupra does not manufacture extra soft bristle brushes. Extra soft bristle brushes are made in China.\u003c\/em\u003e\u003c\/p\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584375455958,"sku":"116.650","price":15.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mk-34-soft-natural-brushes-unmounted-with-18-hole-otto-frei.jpg?v=1719956245"},{"product_id":"supra-mk-1in-soft-natural-bristle-brushes-unmounted-1-8-hole-pack-12","title":"Pack-12 Supra MK 1\" Soft Natural Bristle Brushes-Unmounted With 1\/8\" Hole","description":"\u003cp\u003eThe \u003cstrong\u003eSupra MK 1\" Soft Natural Bristle Brushes\u003c\/strong\u003e are premium unmounted miniature brushes crafted for professional jewelers and metalsmiths who demand consistent, reliable performance. Sold in packs of 12, these 1-inch brushes are \u003cstrong\u003eMade in the USA\u003c\/strong\u003e with solid steel ring construction engineered for durability and long service life. Brush filaments are permanently anchored in the solid steel ring and uniformly distributed to ensure even wear across the entire brush face — delivering predictable, repeatable results on every use.\u003c\/p\u003e\n\u003cp\u003eThese soft natural bristle brushes excel on flat, curved, small, and hard-to-reach surfaces, making them a go-to choice for detail polishing and finishing work. The natural animal hair filaments provide a gentle yet effective action suited to delicate or intricate workpieces.\u003c\/p\u003e\n\u003cp\u003eEach brush features a \u003cstrong\u003e1\/8\" diameter center hole\u003c\/strong\u003e designed for use with hub adapters \u003cstrong\u003e147.257\u003c\/strong\u003e or \u003cstrong\u003e147.259\u003c\/strong\u003e, or with screw mandrels using the correct 1\/8\" diameter screws \u003cstrong\u003e143.160\u003c\/strong\u003e or \u003cstrong\u003e143.162\u003c\/strong\u003e. \u003cem\u003eNote: Using these brushes with thinner 3\/32\" diameter screw mandrels will result in a sloppy fit.\u003c\/em\u003e Otto Frei also carries Supra natural bristle brushes with 3\/32\" diameter holes if that size better suits your setup.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e*Supra does not manufacture extra soft bristle brushes. Extra soft bristle brushes are made in China.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium natural animal hair bristle construction\u003c\/li\u003e\n\u003cli\u003eSolid steel ring for exceptional durability\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003eIdeal for flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eSold in a pack of 12\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e1 inch\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eSoft natural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCenter Hole Diameter\u003c\/th\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eSolid steel ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMount Type\u003c\/th\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eCompatible hole size is 1\/8\"; use with hub adapters 147.257 or 147.259, or screw mandrels 143.160 or 143.162.\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eUsing these brushes with 3\/32\" diameter screw mandrels will produce a sloppy fit — not recommended.\u003c\/em\u003e\u003c\/li\u003e\n\u003cli\u003eSupra also offers these brushes in Medium and Stiff bristle grades.\u003c\/li\u003e\n\u003cli\u003eOtto Frei carries Supra natural bristle brushes with 3\/32\" diameter holes as an alternative.\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eSupra does not produce extra soft bristle brushes. Extra soft options are manufactured in China.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584375783638,"sku":"116.651","price":15.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mk-1-soft-natural-bristle-brushes-unmounted-with-18-hole-otto-frei.jpg?v=1719956246"},{"product_id":"supra-mk-3-4-medium-natural-bristle-brushes-unmounted-1-8-hole-pack-12","title":"Pack-12 Supra MK 3\/4\" Medium Natural Bristle Brushes-Unmounted With 1\/8\" Hole","description":"\u003cp\u003e\u003cstrong\u003eSupra MK 3\/4\" Medium Natural Bristle Brushes\u003c\/strong\u003e are premium unmounted miniature brushes built for precision polishing and finishing work. Manufactured in the USA, these brushes feature solid steel ring construction for exceptional durability. Brush filaments are permanently anchored in the solid steel ring and uniformly distributed to ensure even wear throughout the life of the brush.\u003c\/p\u003e\u003cp\u003eThe natural animal hair bristles deliver controlled cutting action on flat, curved, small, and hard-to-reach surfaces. Available in Soft, Medium, and Stiff grades, these brushes represent the premium tier of natural bristle options on the market. Sold in packs of 12.\u003c\/p\u003e\u003cp\u003eThese brushes feature a \u003cstrong\u003e1\/8\" diameter center hole\u003c\/strong\u003e designed for use with hub adapters or screw mandrels with the correct 1\/8\" diameter screws. \u003cem\u003eNote: Using 3\/32\" diameter screw mandrels with this 1\/8\" hole results in a sloppy, imprecise fit.\u003c\/em\u003e If you require a tighter fit with 3\/32\" mandrels, Otto Frei also carries Supra natural bristle brushes with 3\/32\" diameter holes.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eCompatible hub adapters: 147.257 or 147.259. Compatible screw mandrels: 143.160 or 143.162.\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium natural animal hair bristles for controlled, even polishing action\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for long-lasting durability\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored and uniformly distributed for consistent wear\u003c\/li\u003e\n\u003cli\u003eEffective on flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003e1\/8\" center hole for use with compatible hub adapters and screw mandrels\u003c\/li\u003e\n\u003cli\u003eSold by the dozen (pack of 12)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Grade\u003c\/th\u003e\n\u003ctd\u003eMedium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Material\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCenter Hole Diameter\u003c\/th\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMount Type\u003c\/th\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e12 brushes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSupra does not manufacture extra soft bristle brushes. Extra soft bristle brushes are made in China.\u003c\/li\u003e\n\u003cli\u003eUsing this 1\/8\" hole size with thinner 3\/32\" diameter screw mandrels will result in a sloppy, unstable fit. Use the correct 1\/8\" mandrels or hub adapters for best results.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584376602838,"sku":"116.663","price":15.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mk-34-medium-natural-bristle-brushes-unmounted-with-18-hole-otto-frei.jpg?v=1719956242"},{"product_id":"supra-mk-stiff-3-4-natural-bristle-brushes-unmounted-1-8-hole-pack-12","title":"Pack-12 Supra MK Stiff 3\/4\" Natural Bristle Brushes-Unmounted With 1\/8\" Hole","description":"\u003cp\u003eSupra MK 3\/4\" Stiff natural bristle brushes are unmounted miniature brushes designed for professional jewelers and metalsmiths who demand consistent, even performance across flat, curved, small, and hard-to-reach surfaces. These brushes feature \u003cstrong\u003esolid steel ring construction\u003c\/strong\u003e with filaments permanently anchored and uniformly distributed for even wear throughout the life of the brush. Made with natural animal hair, they deliver reliable stiffness for controlled finishing and polishing applications.\u003c\/p\u003e\u003cp\u003eEach brush includes a \u003cstrong\u003e1\/8\" diameter center hole\u003c\/strong\u003e for use with compatible hub adapters and screw mandrels. Note that using a 3\/32\" diameter screw mandrel with this hole size will result in a loose, sloppy fit—use the correct 1\/8\" hardware for secure mounting. Otto Frei also carries natural bristle brushes with 3\/32\" diameter holes if that configuration is required.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSold by the dozen.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cem\u003e*Supra does not manufacture extra soft bristle brushes. Extra soft bristle brushes are made in China.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eStiff natural animal hair bristles for controlled polishing and finishing\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for durability and long service life\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003e1\/8\" center hole for use with compatible hub adapters and screw mandrels\u003c\/li\u003e\n\u003cli\u003eEffective on flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStiffness\u003c\/th\u003e\n\u003ctd\u003eStiff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHole Diameter\u003c\/th\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRing Construction\u003c\/th\u003e\n\u003ctd\u003eSolid steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMount Type\u003c\/th\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold As\u003c\/th\u003e\n\u003ctd\u003ePack of 12 (1 dozen)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eCompatible hub adapters: \u003cstrong\u003e147.257\u003c\/strong\u003e or \u003cstrong\u003e147.259\u003c\/strong\u003e. Compatible screw mandrels with 1\/8\" diameter screws: \u003cstrong\u003e143.160\u003c\/strong\u003e or \u003cstrong\u003e143.162\u003c\/strong\u003e. Using a 3\/32\" screw mandrel with this 1\/8\" hole will produce an insecure fit—always match mandrel diameter to hole size.\u003c\/p\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584376996054,"sku":"116.664","price":15.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mk-stiff-34-natural-bristle-brushes-unmounted-with-18-hole-otto-frei-1.jpg?v=1719956242"},{"product_id":"supra-mk-medium-1in-natural-bristle-brushes-unmounted-1-8-hole-pack-12","title":"Pack-12 Supra MK Medium 1\" Natural Bristle Brushes-Unmounted With 1\/8\" Hole","description":"\u003cp\u003e\u003cstrong\u003eSupra MK 1\" Medium Natural Bristle Brushes\u003c\/strong\u003e are premium unmounted miniature brushes designed for professional jewelers and metalsmiths who demand consistent performance on detailed finishing work. These brushes are \u003cstrong\u003eMade in the USA\u003c\/strong\u003e with solid steel ring construction, ensuring long-lasting durability through extended use. Brush filaments are permanently anchored in the solid steel ring and uniformly distributed for even wear across the bristle face — delivering reliable, repeatable results on flat, curved, small, and hard-to-reach surfaces.\u003c\/p\u003e\n\u003cp\u003eEach brush is made with natural animal hair in a medium stiffness, offering a balance between flexibility and cutting action. The 1\" diameter and unmounted format make these brushes versatile for use with compatible hub adapters and screw mandrels (sold separately). Sold by the dozen.\u003c\/p\u003e\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePremium natural animal hair bristles in medium stiffness\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for durability and long service life\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003eEffective on flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003eUnmounted design — requires mandrel or hub adapter for use\u003c\/li\u003e\n\u003cli\u003e1\/8\" diameter center hole for use with compatible hub adapters or screw mandrels\u003c\/li\u003e\n\u003cli\u003eSold in packs of 12\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e1\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStiffness\u003c\/th\u003e\n\u003ctd\u003eMedium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCenter Hole Diameter\u003c\/th\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eUnmounted\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in the USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe 1\/8\" center hole is designed for use with hub adapters \u003cstrong\u003e147.257\u003c\/strong\u003e or \u003cstrong\u003e147.259\u003c\/strong\u003e, or with screw mandrels using the correct 1\/8\" diameter screws \u003cstrong\u003e143.160\u003c\/strong\u003e or \u003cstrong\u003e143.162\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eUsing a 3\/32\" diameter screw mandrel with the 1\/8\" hole results in a sloppy fit — not recommended.\u003c\/li\u003e\n\u003cli\u003eNatural bristle brushes with 3\/32\" diameter holes are also available — see part number \u003cstrong\u003e116.657MAIN\u003c\/strong\u003e.\u003c\/li\u003e\n\u003cli\u003eSupra does not manufacture extra soft bristle brushes. Extra soft bristle brushes are made in China.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584381518038,"sku":"116.672","price":17.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mk-medium-1-natural-bristle-brushes-unmounted-with-18-hole-otto-frei.jpg?v=1719956242"},{"product_id":"supra-mk-stiff-1in-natural-bristle-brushes-unmounted-1-8-hole-pack-12","title":"Pack-12 Supra MK Stiff 1\" Natural Bristle Brushes-Unmounted With 1\/8\" Hole","description":"\u003cp\u003eThe Supra MK Stiff 1\" natural bristle brushes are unmounted miniature brushes built for demanding polishing and finishing work. These brushes feature solid steel ring construction for lasting durability, with filaments permanently anchored in the ring and uniformly distributed for consistent, even wear across the brush face. Ideal for flat, curved, small, and hard-to-reach surfaces, these brushes are made in the USA with natural animal hair.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eStiff bristle flex for aggressive surface work\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for durability and longevity\u003c\/li\u003e\n\u003cli\u003eFilaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003eNatural animal hair bristles\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003cli\u003e1\/8\" center hole for use with compatible hub adapters and screw mandrels\u003c\/li\u003e\n\u003cli\u003eSuitable for flat, curved, small, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eSold by the dozen (pack of 12)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameter\u003c\/th\u003e\n\u003ctd\u003e1\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStiffness\u003c\/th\u003e\n\u003ctd\u003eStiff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHole Diameter\u003c\/th\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eSolid steel ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry of Origin\u003c\/th\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e12\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThe 1\/8\" hole is designed for use with hub adapters 147.257 or 147.259, and screw mandrels with 1\/8\" diameter screws 143.160 or 143.162.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003eUsing this 1\/8\" hole size with thinner 3\/32\" diameter screw mandrels will result in a sloppy, imprecise fit.\u003c\/em\u003e Otto Frei also carries natural bristle brushes with 3\/32\" diameter holes for use with those mandrels.\u003c\/li\u003e\n\u003cli\u003e\u003cem\u003eSupra does not manufacture extra soft bristle brushes. Extra soft bristle brushes are made in China.\u003c\/em\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43584382435542,"sku":"116.673","price":17.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-12-supra-mk-stiff-1-natural-bristle-brushes-unmounted-with-18-hole-otto-frei.jpg?v=1719956242"},{"product_id":"natural-bristle-brush-kit-unmounted-1-8-hole-63-piece","title":"Natural Bristle Brush Kit Unmounted 1\/8\" Hole","description":"\u003cp\u003eThe Natural Bristle Brush Kit (Unmounted, 1\/8\" Hole) is a comprehensive polishing and finishing set designed for jewelers and metalsmiths who need a wide range of brush types and sizes in a single, organized package. The kit includes 60 individual unmounted natural bristle brushes spanning extra soft, soft, medium, and stiff grades in 5\/8\", 3\/4\", and 1\" diameters, plus 3 mandrel and attachment accessories — 63 pieces total, stored in a convenient plastic box.\u003c\/p\u003e\n\n\u003cp\u003eWith ten distinct brush styles represented and six of each brush included, this kit is ideal for stocking a bench, outfitting a classroom, or maintaining a full complement of finishing tools for varied polishing tasks.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e63-piece kit stored in a reusable plastic box\u003c\/li\u003e\n\u003cli\u003eIncludes 6 each of 10 different unmounted natural bristle brushes (60 brushes total)\u003c\/li\u003e\n\u003cli\u003eBrush grades include extra soft, soft, medium, and stiff\u003c\/li\u003e\n\u003cli\u003eBrush diameters: 5\/8\", 3\/4\", and 1\"\u003c\/li\u003e\n\u003cli\u003eAll brushes feature a 1\/8\" hole for use with standard 1\/8\" shank mandrels\u003c\/li\u003e\n\u003cli\u003eIncludes 3 mandrel and attachment accessories for immediate use\u003c\/li\u003e\n\u003cli\u003eOrganized assortment covers a broad range of polishing and finishing applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eHole Size\u003c\/th\u003e\n\u003ctd\u003e1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Pieces\u003c\/th\u003e\n\u003ctd\u003e63\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal Brushes\u003c\/th\u003e\n\u003ctd\u003e60 (6 each of 10 styles)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrush Diameters\u003c\/th\u003e\n\u003ctd\u003e5\/8\", 3\/4\", 1\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Grades\u003c\/th\u003e\n\u003ctd\u003eExtra Soft, Soft, Medium, Stiff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStorage\u003c\/th\u003e\n\u003ctd\u003ePlastic box\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.647\u003c\/strong\u003e — Supra MK Soft Natural Bristle Brush 5\/8\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.648\u003c\/strong\u003e — Supra MK Medium Natural Bristle Brush 5\/8\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.650\u003c\/strong\u003e — Supra MK Soft Natural Bristle Brush 3\/4\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.651\u003c\/strong\u003e — Supra MK Soft Natural Bristle Brush 1\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.662\u003c\/strong\u003e — Extra Soft Natural Bristle Brush 3\/4\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.663\u003c\/strong\u003e — Supra MK Medium Natural Bristle Brush 3\/4\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.664\u003c\/strong\u003e — Supra MK Stiff Natural Bristle Brush 3\/4\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.671\u003c\/strong\u003e — Extra Soft Natural Bristle Brush 1\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.672\u003c\/strong\u003e — Supra MK Medium Natural Bristle Brush 1\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e116.673\u003c\/strong\u003e — Supra MK Stiff Natural Bristle Brush 1\", Unmounted 1\/8\" Hole\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e143.160\u003c\/strong\u003e — Mandrel on 1\/8\" Shank With 1\/8\" Screw\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e143.162\u003c\/strong\u003e — Mandrel on 1\/8\" Shank With 1\/8\" Screw\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e147.257\u003c\/strong\u003e — Brush Attachment 1\/8\" Right White Plastic\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43586828533974,"sku":"116.675","price":78.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/natural-bristle-brush-kit-unmounted-18-hole-otto-frei.jpg?v=1719955767"},{"product_id":"supra-me-stiff-natural-bristle-end-brushes-1-4-trim-3-32-shank-pack-3","title":"Pack-3 Supra ME Stiff 1\/4\" Trim Natural Bristle End Brushes-Mounted on 3\/32\" Shanks","description":"\u003cp\u003eThe Supra ME Stiff Natural Bristle End Brushes deliver precise cleaning, polishing, and finishing performance in tight spaces that larger tools simply cannot reach. Mounted on 3\/32\" shanks and trimmed to a 1\/4\" working length, these miniature end brushes are ideal for flat surfaces, curved contours, and hard-to-reach recesses on fine jewelry and small metal components.\u003c\/p\u003e\u003cp\u003eCrafted with natural animal hair filaments, the bristles are permanently anchored within a solid steel ring construction for lasting durability and consistent performance. The uniform distribution of filaments ensures even wear across the brush face, extending working life and maintaining steady contact with the workpiece. These brushes are made in the USA and rated for use up to 25,000 RPM.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eStiff natural animal hair bristles for firm, controlled action\u003c\/li\u003e\n\u003cli\u003e1\/4\" trim length for precise access to small and detailed areas\u003c\/li\u003e\n\u003cli\u003eMounted on 3\/32\" shanks for compatibility with standard flex shaft and rotary handpieces\u003c\/li\u003e\n\u003cli\u003eSolid steel ring construction for durability and long service life\u003c\/li\u003e\n\u003cli\u003eBristle filaments permanently anchored and uniformly distributed for even wear\u003c\/li\u003e\n\u003cli\u003eEffective on flat, curved, and hard-to-reach surfaces\u003c\/li\u003e\n\u003cli\u003eMade in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eTrim Length\u003c\/th\u003e\n\u003ctd\u003e1\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShank Size\u003c\/th\u003e\n\u003ctd\u003e3\/32\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBristle Type\u003c\/th\u003e\n\u003ctd\u003eNatural animal hair\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eStiffness\u003c\/th\u003e\n\u003ctd\u003eStiff\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConstruction\u003c\/th\u003e\n\u003ctd\u003eSolid steel ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum Operating Speed\u003c\/th\u003e\n\u003ctd\u003e25,000 RPM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOrigin\u003c\/th\u003e\n\u003ctd\u003eMade in USA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePack Quantity\u003c\/th\u003e\n\u003ctd\u003e3 brushes per pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eWhat's Included\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e3 Supra ME Stiff 1\/4\" Trim Natural Bristle End Brushes mounted on 3\/32\" shanks\u003c\/li\u003e\u003c\/ul\u003e","brand":"Supra","offers":[{"title":"Default Title","offer_id":43586856222934,"sku":"116.701","price":7.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pack-3-supra-me-stiff-14-trim-natural-bristle-end-brushes-mounted-on-332-shanks-otto-frei.jpg?v=1719955756"}],"url":"https:\/\/www.ottofrei.com\/collections\/supra-natural-bristle-brushes-jewelry.oembed","provider":"Otto Frei","version":"1.0","type":"link"}