1、Excellent lightweight high‑silicon aluminum alloy, come with strong thermal diffusion ability 2、Come with good thermal fit to the piston and reduces the weight of the whole machine, the thermal conductivity is increased by 42% 3、Produced with one‑piece forming, increase the strength of the machine body and improve the surface hardness 4、Greatly improved wear resistance, corrosion resistance and high temperature impact resistance, sturdy and stable 5、This replacement kit come with small size and light weight, reduce the difficulty of work, convenient to use Item Type: Cylinder Piston Kit Material: High silicon aluminum alloy Cylinder Diameter: Approx. 44mm / 1.7in 1 x Cylinder 1 x Piston 2 x Piston Circle 2 x Piston Ring 1 x Piston Pin 2 x Gasket 1 x Bearing