Superior Pads and Abrasives RSP30 5 inch Diameter 5 Holes PSA Adhesive Back Sander Pad Replaces Porter Cable 13901 Standard adhesive-back replacement pad (5 inch) Pad will accept 5 inch adhesive-back sandpaper discs with five holes Replaces Porter Cable 13901 Specifications: Diameter: 5" | Vacuum Holes: 5 | Type: PSA / Adhesive Back