The Porter Cable PC4MBP 4" Medium Polishing/Buffing Wheel in white color is designed for buffing tasks. Made with cloth abrasive material, this polishing wheel is suitable for half-inch face polishing and buffing. With a diameter of 4 inches and a 5/8" arbor size, it is lightweight at 2.6 ozs. The unit is sold individually and is suitable for various power tools and workshop equipment.