Rotary 2 7/8 inch Flexible Backing Plate Our Rotary 2 7/8 inch Flexible Backing Plate provides the safest, most durable surface for your pads so that you get the best performance possible from your polisher. Urethane is highly resistant to heat. The Flexible Backing Plate minimizes the transfer of heat from the polisher motor to the paint to prevent burning. The Flexible Backing Plate is perfect for the Spot Buffs 4 inch Foam Pads or 4 inch wool pads. 2 7/8 inch diameter