Condition: Brand New_x000D_ Item Type: Chain Saw Accessory_x000D_ Cylinder Material: Die-Cast Aluminum_x000D_ Piston Material: Aluminum_x000D_ Cylindrical Pin Material: Alloy Steel_x000D_ Piston Ring Material: Ductile Iron_x000D_ Circlip Material: 65Mn_x000D_ Cylinder Coating: Chrome Plating_x000D_ Fitment: Fit for Stihl MS381 Cylinder Assembly_x000D_ Piston Diameter: Approx.52mm/2in_x000D_ Weight: Approx.815g/28.7oz 1The cylinder piston kit is a accuracy part cast from special materials, has good wear resistance and long service life, compact structure and high hardness 2The piston diameter is 52mm/2in, which is convenient for installation and removal. 3Suitable for Stihl MS381 chainsaw universal cylinder piston assembly and complete set of accessories 4With excellent workmanship, perfect replacement for the old one. 5Complete accessories, the product is simple and easy to install.1 x Cylinder1 x Piston1 x Cylindrical Pin2 x Piston Ring2 x Circlip4 x Cylinder Gasket1. Please allow 1?2cm error due to manual measurement. Thanks for your understanding._x000D_ 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.