Fiber Disc, Abrasive Type Non-Woven, Abrasive Material Ceramic, Backing Material Fiber, Backing Weight Y, Grit 36, Overall Diameter 7 in, Series 782C, Coating Coverage Closed, Maximum Operating Speed 8,600 RPM, Resistance Properties Tear, Connector Size 7/8 in, Connector Type Unthreaded Hole, Color Maroon, Grade Extra Coarse.