This is a A-4357866 Trans Disc: 11", organic, rigid, incl w/ pressure plate PN: 4357866Main Description As Following : A-4357866 Trans Disc: 11", organic, rigid, incl w/ pressure plate P.N: 4357866 Spline Count: 20Spline Diameter: 1.575" Stocked As: A-328001716 Found in Section & Models : Clutch Parts > Double Clutch, Allis-Chalmers TRACTOR: 6240 (S/N 7722-0519--7726-0913>) Associated Items : New Also This is An Aftermarket Product And : Spline Count: 20 Spline Diameter: 1.575"