This is a A-RE43390 Disc, Brake PN: RE43390Main Description As Following : A-RE43390 Disc, Brake P.N: RE43390 Outside Diameter: 12.000"Replaces: AR65718Spline Count: 11 Replaces: AR65718 JOHN DEERE , Crossed From: AMRE43390 , , WN-RE43390 , , WNRE43390 , Found in Section & Models : Transmission & Rear Axle > Brake Disc and Plates, John Deere TRACTOR: 2440 (SN 341000->), John Deere TRACTOR: 2630, John Deere TRACTOR: 2640 Associated Items : New Also A-JD-O-OMR62127, A-JD-O-OMR70798, A-JD-S-TM1142, A-SMJD202, A-FRM-JD, A-JD-O-OMR56168, A-SMJD202, A-JD-O-OMR62127, A-JD-O-OMR70798, A-JD-P-PC1539, A-JD-S-TM1142, A-SMJD202 And : Outside Diameter: 12.000" Replaces: AR65718 Spline Count: 11