Flap Disc Abrasive Type Coated Abrasive Material Aluminum Oxide Grade Coarse Backing Plate Material Fiberglass Connector Size 7/8 in Connector Type Unthreaded Hole Density Rating High Flap Disc Type Radial Overall Diameter 5 in Series A SGP CURVE Backing Material Fiberglass Backing Weight X Grit 40 Maximum Operating Speed 12 200 RPM Features Performance Coated