This is a A-259030M1 Sprocket, Idler PN: 259030M1Main Description As Following : A-259030M1 Sprocket, Idler P.N: 259030M1 Used on RH drive w/ slat elev.Dim A (1): dbl 19 tooth, 50 chainDim B (2): 4.121" OD Replaces: 259030V1 MF COMBINE PARTS , Crossed From: AV101584 VAPORMATIC Found in Section & Models : Headers/Platforms/Feeder House > Feeder House Parts, Massey Ferguson COMBINE: 750, Massey Ferguson COMBINE: 760, Massey Ferguson COMBINE: 850, Massey Ferguson COMBINE: 860 Associated Items : New Also A-MH-S-MF750760, A-MH-S-MF750760 And : Used on RH drive w/ slat elev. Dim A (1): dbl 19 tooth, 50 chain Dim B (2): 4.121" OD