Check the listing for details. Lake Country 3" DA Backing Plate. Condition: New. Listed at 12.50 USD. The 3 Inch DA Backing Plate is designed to offer perfect balance and support for 3 inch foam pads. The actual diameter is 2 7/8 inches, so the plate is recessed back from the edge of the pad slightly for safety. Use this backing plate with your Griot's Garage Professional Random Orbital 3 Inch Polisher.The 3 Inch DA Backing Plate helps you get the best results with your polisher. The backing plate is made of polyurethane to dampen the vibration and reduce the transfer of heat from the polisher. The beveled edge minimizes the chance of impact with the paint. The core of the plate is reinforced with steel struts to maintain balance and apply even pressure to the pad.The 3 Inch DA Backing Plate has hook and loop fasteners for quick pad changes.Equip your 3 inch polisher or air tool with the very best backing plate for balance and performance.2 7/8 inch diameterThese backing plates are designed to fit most dual action polishers including the Porter Cable 7424XP, Meguiars G110v2 and the Griots Garage Random Orbital Polisher.