This is a A-R50300 Shaft, PTO (1000 RPM) PN: R50300Main Description As Following : A-R50300 Shaft, PTO (1000 RPM) P.N: R50300 Dim A (1): 54.812" longDim B (2): 21/ 6 Splines Crossed From: AMR50300 , , WN-R50300 , , WNR50300 , Found in Section & Models : PTO Parts > PTO and Related Parts, John Deere TRACTOR: 4630 (POWER SHIFT) Associated Items : New Also A-FRM-JD, A-JD-O-OMR65495, A-JD-P-PC1296, A-JD-S-TM1172, A-SMJD50 And : Length: 54.812" Spline: 21 / 6