This is a A-633112409 Kit Incls: 3599492M91 P. Plate, 1688207M91 Trans Disc PN: 633112409Main Description As Following : A-633112409 Kit Incls: 3599492M91 P. Plate, 1688207M91 Trans Disc P.N: 633112409 Spline Count: 25Spline Diameter: 1.625" Found in Section & Models : Clutch Parts > Split Torque Clutch, Massey Ferguson TRACTOR: 390T (Optional S/N