This is a A-709649R1 PTO Disc: 9", organic, rigid PN: 709649R1Main Description As Following : A-709649R1 PTO Disc: 9", organic, rigid P.N: 709649R1 Spline Count: 10Spline Diameter: 1.750" Stocked As: A-100179 Found in Section & Models : Clutch Parts > Double Clutch, Case-IH TRACTOR: B250, Case-IH TRACTOR: B275, Case-IH TRACTOR: 276, Case-IH TRACTOR: 434 Associated Items : New Also A-IH-O-B250DSL, A-IH-P-B250, A-IH-S-TOOLSLATE, A-IH-O-B275GD, A-IH-P-B275DSL, A-IH-S-B275D, A-IH-S-TOOLSLATE, A-SMIH201, A-IH-O-BATTIGN, A-IH-S-TUNELATE, A-IH-P-434, A-IH-S-BC144, A-IH-S-TOOLSLATE, A-IH-S-434 And : Spline Count: 10 Spline Diameter: 1.750"