PSA Disc Backup Pad Abrasive Mount Type Adhesive-Backed Abrasive Mounting Quick Change System Not Applicable Connector Size 5/8 In.-11 Connector Type Threaded Hole Backup Pad Shape Round Device Material Rubber Density Medium Maximum Operating Speed 6 600 RPM Number of Vacuum Holes Non-Vacuum Overall Width 7 in Overall Diameter 7 in Overall Thickness 1/4 in Product Type Disc Backup Pad