Fiber Disc, Abrasive Type Coated, Abrasive Material Aluminum Oxide, Backing Material Fiber, Backing Weight Not Rated, Grit 60, Overall Diameter 9 1/8 in, Series F240, Maximum Operating Speed 6,600 RPM, Resistance Properties Tear, Connector Size 7/8 in, Connector Type Unthreaded Hole, Color Brown, Grade Coarse