●2pcs Backing Pad; Diameter: 125mm/5 inch; Maximum RPM: 12,000 ●Well Controlled Balance and Vibration-Free Smooth operation. ●Made of Polyurethane, flexible and very durable to minimizes heat transfer. ●Great for sanders, grinders, and power tools. Compatible with Most Rotary Buffing Machines. ●Hook & Loop Backing Pads are Professional Lightweight & Perfectly Balanced for Faster Working and Smooth Finish.