Fiber Disc, Abrasive Type Coated, Abrasive Material Aluminum Oxide, Backing Material Fiber, Backing Weight Not Rated, Grit 50, Overall Diameter 4 1/2 in, Series V0947, Maximum Operating Speed 11,000 RPM, Resistance Properties Tear, Connector Size 7/8 in, Connector Type Unthreaded Hole, Color Brown, Grade Coarse, Package Quantity 25