This is a A-1500374-RO Trans Disc: 6.5", organic, solid, RE-MFG PN: 1500374-ROMain Description As Following : A-1500374-RO Trans Disc: 6.5", organic, solid, RE-MFG P.N: 1500374-RO Spline Count: 10Spline Diameter: 0.9375" Stocked As: A-04010583 Found in Section & Models : Clutch Parts > Single Clutch, Massey Ferguson TRACTOR: PACER, Massey Ferguson TRACTOR: PONY Associated Items : New Also This is An Aftermarket Product And : Spline Count: 10 Spline Diameter: 0.9375"