H7355 Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Extra Coarse Backing Plate Material Phenolic Connector Size 5/8 in Connector Type Unthreaded Hole Density Rating Standard Flap Disc Type Type 29 Overall Diameter 4 in Quick Change System Not Applicable Series Tiger Backing Material Phenolic Backing Weight X Grit 36 Maximum Operating Speed 15 000 RPM