Notes: ER125270 DOUBLE U-JOINT B300 55 D (GR. 169 Z12 M3 is original JOHN-DEERE product. ER125270 DOUBLE U-JOINT B300 55 D (GR. 169 Z12 M31 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849