Flap Disc Abrasive Type Coated Abrasive Material Ceramic Grade Medium Backing Plate Material Fiberglass Connector Size 5/8 In.-11 Connector Type Threaded Hole Density Rating High Flap Disc Type Radial Overall Diameter 4 1/2 in Series CO SGP CURVE Backing Material Fiberglass Backing Weight Consumable Grit 60 Maximum Operating Speed 13 300 RPM Features Performance Coated