Superior Pads and Abrasives RSP31 5 inch Diameter PSA Adhesive Back Sander Pad with No Vacuum Holes Replaces Porter Cable 13900 Standard adhesive-back replacement pad (5 inch) Fits the Porter Cable 332 random orbit sander Leaves a smooth finish on flat surfaces Specifications: Diameter: 5" | Vacuum Holes: No | Type: PSA / Adhesive Back