This is a A-RE29777 Trans Disc: 12" PN: RE29777Main Description As Following : A-RE29777 Trans Disc: 12" P.N: RE29777 Spline Count: 21Spline Diameter: 1.375" Replaces: RE29777-RO JOHN DEERE Found in Section & Models : Clutch Parts > Syncro/Quad Range, John Deere TRACTOR: 50, John Deere TRACTOR: 5020, John Deere TRACTOR: 6030 Associated Items : New Also A-FRM-JD, A-JD-O-OMR2033, A-JD-P-PC264, A-JD-S-SM2010, A-JD-S-SM2011, A-JD-S-SM2024, A-JD-S-SM2029, A-JD-S-SM2045, A-JD-S-SM2050, A-SMJD10, A-JD-O-OMR42449, A-JD-P-PC1156, A-JD-P-PC978, A-JD-S-TM1022, A-SMJD203, A-SMJD203 And : Spline Count: 21 Spline Diameter: 1.375"