Features Convenient and Practical: Practical, chainsaw piston can be used with confidence, meanwhile, it keeps guaranteed quality. High Performance: Due to compact structure and high hardness, this cylinder assembly is entitled with high performance according to strict rule. Scope of Application: Fit for H51 51 gasoline chain saw, exquisite craftsmanship entitle general cylinder piston assembly and complete set accessories with high performance. Easy to Install: Not easy to damage, this chainsaw cylinder can be used for a long time, which also supports easy installation. Premium Material: Good wear resistance helps this cylinder and piston with long service life, which is cast by special materials. Specification: Item Type: Cylinder Cylinder Material: Die-cast aluminum Piston Material: Aluminum Cylindrical Pin Material: Alloy steel Piston Ring Material: Ductile iron Circlip Material: 65Mn Cylinder Coating: Chrome plating Piston Diameter: Approx. 45mm / 1.77in Specifications: For Husqvarna 51 cylinder assembly Package List: 1 x Cylinder 1 x Piston 1 x Cylindrical Pin1 x Piston Ring2 x Circlip Note: The diameter of the piston is 45mm, please pay attention to the reference before buying. Package List 1 x Cylinder 1 x Piston 1 x Cylindrical Pin 1 x Piston Ring 2 x Circlip