Cylinder Piston Kit Replacement Cylinders Pistons Mountable For STIHL MS180 Feature:1. Made of lightweight aluminum alloy with high silicon content, with high thermal diffusion capacity2. Compared with the bimetal structure, the thermal conductivity is increased by 42%, and it has good thermal matching with the piston and reduces the weight of the whole machine3. One-piece molding, increase the strength of the machine body and improve the surface hardness4. Significantly increased wear resistance, corrosion resistance and high temperature impact resistance5. Strong gas compression ability, providing growth force, clear thread and smooth knob, not easy to jamSpecification:Item Type: Cylinder Piston KitMaterial: High Silicone Aluminum AlloyCylinder Diameter: Approx. 38mm/1.5inPacking List:1 x Cylinder1 x Piston2 x Piston Wheel2 x Piston Ring1 x Piston Pin