This is a A-4400AA Trans Disc: 12", organic, spring loaded PN: 4400AAMain Description As Following : A-4400AA Trans Disc: 12", organic, spring loaded P.N: 4400AA Spline Count: 10Spline Diameter: 1.500" Replaces: A5122-RO CASE , 5122 CASE , Crossed From: A4400AA , Found in Section & Models : Clutch Parts > Single Clutch, Case-IH TRACTOR: D (Foot Operated S/N 5600001>), Case-IH TRACTOR: DC (Foot Operated S/N 5600001>), Case-IH TRACTOR: DO (Foot Operated S/N 5600001>), Case-IH TRACTOR: DV (Foot Operated S/N 5600001>) Associated Items : New Also A-CA-O-D, A-CA-O-DERLY, A-CA-O-HYDUNIT, A-CA-P-DCDH, A-CA-P-DDCMID, A-CA-P-DDCWHCH, A-CA-P-DEARLY, A-CA-P-MAG, A-CA-S-DSERIES, A-CA-S-DSLAHYD, A-CA-S-MAGNETO, A-FRM-IHOL, A-IH-P-TITD20-25, A-MAG-S-317, A-CA-O-D, A-CA-O-DCWOHCH, A-CA-P-DCDH, A-CA-P-DDCMID, A-CA-P-DDCWHCH, A-CA-P-MAG And : Spline Count: 10 Spline Diameter: 1.500"