J1543 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 Standard Flap Disc Type Type 29 Overall Diameter 4 1/2 in Series Predator AF Backing Material Polyester Backing Weight Y Coating Coverage Closed Grit 80 Maximum Operating Speed 13 300 RPM Color Yellow Features Hard Edge