Superior Pads and Abrasives RSP29 5 Inch Sander Pad - Hook and Loop Replaces Porter Cable OE # 13904 / 13909 (1) Standard replacement pad for Porter Cable 333 and 333VS Random Orbit sander Ultra convenient dust collection feature Easy screw-on installation five-inch diameter Prevents damage to disc holders Specifications: Diameter: 5" | Vacuum Holes: 5 | Type: Hook & Loop