[Compatible with]Piston and cylinder for Husqvarna 545, 550, 545XP, 550XP, 550XPG series chain saws. [High Durability]Made of chrome alloy and coated with Nikasil, the cylinder has high thermal conductivity and durability, and is designed to last. [Easy Installation]Strict adherence to original specifications and OEM standards, replacing and installing the cylinder is quick and easy. [Package Includes] Cylinder Assembly (Including Cylinders, Pistons, Rings, Piston Pins, Retaining Rings), Air Filter 1, Spark Plug 1, Decompression Valve 1st [OEM Part Number] Spare Parts for Husqvarna 577 76 47-06, 577 76 47-07, 577 76 47-08. The high-quality cylinder helps to maintain the good engine condition of the chain saws. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin