Home / Home Improvement / Parts / Sander Backing Pad DP13904 Sander Backing Pad DP13904Price Not Available Price may not be up-to-date. Out of Stock View Product Part Number: DP13904 Brand: PORTER CABLE CO Seller: Sears PartsDirect Categories: Home Improvement, Parts Possible Matches$147.59Indiana Hoosiers #44 Game Used White Jersey Nameplate Removed M DP1... Description This backing pad (part number DP13904) is for sanders. Backing pad DP13904 cushions the sanding paper. Unplug the sander before installing this part. Wear work gloves to protect your hands.