CYLINDER AND PISTON KIT FOR CHAINSAWS COMPATIBLE WITH VARIOUS MAKES: ZENOAH - HUSQVARNA - ALPINA - CASTOR SIDE INTAKE HOLE PISTON DIAMETER 34 MM COMPATIBLE WITH MODELS: ALPINA PR 270 ALPINA A 305 ALPINA CJ 300 CASTOR TR 300 ZENOAH 2500 ZENOAH G250 ZENOAH GG2500TS HUSQVARNA T 425 CODE: 54.120.1711 SM