Check the listing for details. 36 Pcs Natural Bristle Brushes 1" Medium Unmounted Wheel with 1/8" Center Hole. Condition: New. Listed at 18.00 USD. BRUSHES NATURAL BRISTLE BRUSHES 1" DIAMETER - MEDIUM - GRADE HARDNESS UNMOUNTED with 1/8” CENTER HOLE 36Pcs Natural Bristle Brushes are excellent for light deburring, cleaning, or polishing hard to reach areas. Brushes are unmounted, with a 1/8” center hole for use with miniature mandrels on rotary tools. Brushes are used in cleaning in between prongs, tight areas and crevices, work well for light deburring, cleaning, or polishing hard to reach areas. They can be used with polishing compounds and pastes. The Medium bristle brushes are the regular grade and preferred many polishers, since they are not too stiff, nor too soft. Brushes can be used with Flexshaft machines or on bench motors and grinders with brush holding adapter. Note: See Tapered chuck mandrel threaded ebay item ID # 200807300425 JETS Product # 1603-431 Sale is for 3 packs of 12 Brushes (Total 3 Dozen) SPECIFICATIONS: JETS Product # 1115-1623 - Bristle Grade Hardness: Medium - Wheel Diameter: 1" - 25mm - Center Hub: Metal - Center Hole Size: 1/8" - 3.15mm SHIPPING: Via USPS FIRST CLASS MAIL NOTE: Visit JETSTOOLS ebay Store Listings, where you can see various Grades and Sizes of Bristle Brushes, Spindles, Arbors, Miniature Mandrels and Holders along with more Jewelers Equipment Tools and Supplies. JETSINC. E1 520 CKSP M