Superior Pads and Abrasives RSP40-k 6 inch Diameter 6 Vacuum Holes 5/16 inch-24 UNF Threaded Shaft PSA Adhesive Back Sanding Pad Replaces Porter Cable 17000 2 per pack
2Pcs 5" 5 Hole Hook & Loop Sander Pad For Porter Cable 13904 13909 332 333 334 - Walmart.com
6 Inch Sander Pad Random Orbit Hook Loop Backing for Porter Cable Orbit Sander | eBay
Porter-Cable 6 in. Standard Adhesive Back Replacement Pad 16000 - The Home Depot