Features: This is a steel mount and demount head with mounting rubber pad used on many tire changer machines. It prevents wheel from scratching and damaging when clamping wheel from inside clamps. It can be used for many times with stable characteristics and high performances. Suitable for mini car, electric car, motorcycle, go-kart, and so on. Wheel typically ranges in size from 6 to 13inches. With precisions steel casting and smooth surfaces to reduce frictions, it is very easy to use. Specifications: Material:Steel Diameter:28mm/1.1',29mm/1.14',30mm/1.18' Package Includes: 1Set Tire Machine Duck Head note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.