CLUTCH PINION FOR GGP STIGA CASTELGARDEN ALPINA CHAINSAW WITH PUMP ENGAGEMENT FOR MODELS: PR270, CJ300, CJ305 DIMENSIONS: (A) BORE: 13 MM (B) OUTER DIA: 57 MM (C) INNER DIA: 54 MM INCH PITCH: 1/4 " N TEETH: 8 CODE: 656064 ORIGINAL CODE: 23050005-6995178 GGP ALPINA STIGA CASTELGARDEN VR