This is a A-10A13863 Trans Disc: 10", organic, solid PN: 10A13863Main Description As Following : A-10A13863 Trans Disc: 10", organic, solid P.N: 10A13863 Spline Count: 13Spline Diameter: 1.750" Replaces: 10A13863-RO WHITE TRACTOR , Crossed From: SW00106 , Found in Section & Models : Clutch Parts > Single Clutch, White/ Oliver/ Mpl Moline TRACTOR: Z, White/ Oliver/ Mpl Moline TRACTOR: 335 (Gas) Associated Items : New Also A-MM-P-ZUNSTD, A-MM-S-ZEARLY, A-MM-SO-Z, A-MM-P-335 And : Spline Count: 13 Spline Diameter: 1.750"