Disc Backup Pad Abrasive Mount Type Hook and Loop Abrasive Mounting Quick Change System TS Connector Type Threaded Hole Backup Pad Shape Round Device Material Plastic Density Soft Maximum Operating Speed 1 500 RPM Number of Vacuum Holes 8 Color Black Overall Length 9 in Overall Width 9 in Overall Diameter 9 in Overall Thickness 1/2 in Product Type Disc Backup Pad Compatible with Manufacturer Model Number BNR1837 BNR1839 Compatible Face Plate Diameter (Maximum) 9 in