H7361 Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Coarse Backing Plate Material Phenolic Connector Size 7/8 in Connector Type Unthreaded Hole Density Rating Standard Flap Disc Type Type 29 Overall Diameter 4 1/2 in Quick Change System Not Applicable Series Tiger Paw Backing Material Phenolic Backing Weight X Grit 40 Maximum Operating Speed 13 000 RPM