Flap Disc, Abrasive Type Coated, Abrasive Material Ceramic, Grade Coarse, Backing Plate Material Fiberglass, Connector Size 5/8 in, Connector Type Unthreaded Hole, Density Rating Standard, Flap Disc Type Type 29, Overall Diameter 4 in, Series 969F, Backing Material Polyester, Backing Weight YF, Coating Coverage Closed, Grit 40, Maximum Operating Speed 15,000 RPM, Color Maroon, Features Performance Coated, Resistance Properties Load