Flap Disc Abrasive Type Coated Abrasive Material Ceramic Grade Coarse Backing Plate Material Phenolic 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 Tiger Ceramic Backing Material Phenolic Grit 40 Maximum Operating Speed 13 000 RPM Color Red Features Performance Coated