STIHL COMPATIBLE PISTON FOR POWER SAWS MODELS: 029 MS290 CHARACTERISTICS: PISTON Ø: 46 mm PISTON LENGTH: 31.5 mm Ø OUTSIDE OF PISTON: 10 mm Ø INSIDE OF PISTON: 6 mm STIHL TOP QUALITY Part No.: 54.230.1671 Original part No.: CZ