CLUTCH PINION FOR GGP STIGA CASTELGARDEN ALPINA CHAINSAW WITH CAGE FOR MODELS: P400, 450, 460, 500, 510 DIMENSIONS: (A) HOLE: 14 MM (B) OUTER DIAMETER: 72 MM (C) INNER DIAMETER: 69 MM INCH PITCH: 325" N TEETH: 7 CODE:656033 ORIGINAL CODE: 4121960 GGP ALPINA STIGA CASTELGARDEN VR