This is a A-TX14989-RO Re-mfg PTO disc: 11" Organic, solid PN: TX14989-ROMain Description As Following : A-TX14989-RO Re-mfg PTO disc: 11" Organic, solid P.N: TX14989-RO Spline Count: 10Spline Diameter: 1.000" Stocked As: A-72091671 Found in Section & Models : Clutch Parts > Double Clutch, Long TRACTOR: 2310, Long TRACTOR: 2410, Long TRACTOR: 2510, Long TRACTOR: 2610, Long TRACTOR: 510, Long TRACTOR: 610 Associated Items : New Also A-LO-O-510DTC, A-LO-P-350, A-LO-S-360, A-LO-O-610, A-LO-S-560 And : Spline Count: 10 Spline Diameter: 1.000"