' Fiber Disc, Disc Dia. 4-1/2 In., Mounting Hole Size 7/8 In., Abrasive Type Coated, Abrasive Material Ceramic, Grit 36, Grade Extra Coarse, Backing Material Fiber, Backing Weight Y, Max. RPM 11, 000, Series FX965, Vacuum Hole Design No Hole, Color Brown, Package Quantity 25 '