{"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","url":"https:\/\/www.ottofrei.com\/products\/supra-mk-5-8-soft-natural-bristle-brushes-unmounted-1-8-hole-pack-12","provider":"Otto Frei","version":"1.0","type":"link"}