H7359 Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Medium Backing Plate Material Phenolic Connector Size 7/8 in Connector Type Unthreaded Hole Density Rating Standard Flap Disc Type Type 27 Overall Diameter 4 1/2 in Quick Change System Not Applicable Series Tiger Paw Backing Material Phenolic Backing Weight X Grit 60 Maximum Operating Speed 13 000 RPM