This is a A-503433M1 Shaft, PTO Drive PN: 503433M1Main Description As Following : A-503433M1 Shaft, PTO Drive P.N: 503433M1 Dim A (1): 11.575" LengthDim B (2): 17/21 Splines Crossed From: AM503433M1 , , HD503433M1 , Found in Section & Models : PTO Parts > PTO and Related Parts, Massey Ferguson TRACTOR: 1100, Massey Ferguson TRACTOR: 1105, Massey Ferguson TRACTOR: 1130, Massey Ferguson TRACTOR: 1135, Massey Ferguson TRACTOR: 1150, Massey Ferguson TRACTOR: 1155 Associated Items : New Also This is An Aftermarket Product And : Dim A (1): 11.575" Length Dim B (2): 17/21 Splines