CLUTCH SPROCKET FOR ECHO chainsaw with cage FOR MODELS: CS451, CS452, CS500, CS510, CS550, CS610 DIMENSIONS: (A) BORE: 14 MM (B) OUTER DIAMETER: 80 MM (C) INSIDE DIAMETER: 77 MM INCH WIDTH: 3/8 " NÃ' TEETH: 7 CODE: 656225 ORIGINAL CODE: 21358X ECHO VR