MowerPartsGroup Stihl TS400 Concrete/Chop Saw Rebuild Kit Includes Cylinder Gaskets Air Filter Decompression Valve Bearings Spark Plug Fits Stihl TS400 Concrete Saw Kit Includes as Pictured: Cylinder, Piston/Rings, Decompression Valve, Air Filter Set, Gasket Set, Bosch Spark Plug, Crankshaft and Needle Bearings Please see description for full description.