4.5" polishing ball (replacement ball MTN4203-1) 16" x 16" microfiber towel 4 oz. Universal Metal and Plastic Polish (replacement polish MTN4203-2) Maximum recommended rpm = 2,000This ball is designed to get into those hard to reach areas on automobiles, boats, motorcycles, and wheel covers. Has a .25" safety coated drive shaft to protect work surfaces. Special combination of a fiber material and foam for cleaning and polishing. Use with cordless drills. The shaft is removable so the ball can be machine washed. 4.5" Diameter.