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