This is a A-RE37104 Disc, Syncro PN: RE37104Main Description As Following : A-RE37104 Disc, Syncro P.N: RE37104 Inside Diameter: 3.250"Outside Diameter: 4.225" Crossed From: WN-RE37104 , , WNRE37104 , Found in Section & Models : Transmission & Rear Axle > Clutch Disc: Trans and PTO, John Deere TRACTOR: 2010 (Syncro range), John Deere TRACTOR: 2520 (Syncro range), John Deere TRACTOR: 4000 (Syncro range), John Deere TRACTOR: 4010 (Syncro range), John Deere TRACTOR: 4020 (Syncro range), John Deere TRACTOR: 4030 (w/ Syncro/Quad), John Deere TRACTOR: 4230 (W/ Syncro/Quad SN <-037595), John Deere TRACTOR: 4430 (w/ Syncro/Quad SN <-066737), John Deere TRACTOR: 4430 (Syncro range) Associated Items : New Also A-FRM-JD, A-JD-O-OMT14690T, A-JD-O-OMT14695, A-JD-O-OMT14697, A-JD-O-OMT18596, A-JD-O-OMT18597T, A-JD-P-PC689, A-JD-S-SM2035, A-SMJD21, A-SMJD202, A-JD-O-OMR46934, A-JD-O-OMR48273, A-JD-P-PC1116, A-JD-S-TM1006, A-SMJD203, A-FRM-JD, A-JD-O-OMR32129, A-JD-P-PC737, A-JD-S-SM2039, A-MW-OP-JD4010 And : Inside Diameter: 3.250" Outside Diameter: 4.225"