Disc Backup Pad Abrasive Mount Type Threaded Shank Connector Size 5/8 In.-11 Connector Type Threaded Hole Backup Pad Shape Round Device Material Rubber Density Not Applicable Maximum Operating Speed 8 500 RPM Number of Vacuum Holes Non-Vacuum Color Black Overall Width 7 in Overall Diameter 7 in Product Type Disc Backup Pad Compatible with Manufacturer Model Number 7 or 9 in Sanders Polishers or Angle Grinders 9227C GA7910 PV7001C Compatible Face Plate Diameter (Maximum) 9 in