Suitable: 8 inches (approximately 20.3 cm) airway polishing wheels are suitable for polishing vehicle parts, such as wheels, oil tanks, bumpers, fenders, etc., or aluminum, brass, copper, and stainless steel other metal trims/parts. Features: The airway wheel design allows longer and cooler than the standard buffer, and the recommended maximum speed safety limit is 3000. Material: High-grade stainless steel are used for polishing.The galvanized center ring is very . airway polishing wheel diameter: 8 inches, inner shaft hole: 5/8 inches, 16 layers . colour: blue + yellow + white Material: stainless steel Package Contents: 3 x Polishing wheel Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.