Notes: RE73077 DOUBLE U-JOINT B300 55 D (GR.150 Z12 M2. is original JOHN-DEERE product. RE73077 DOUBLE U-JOINT B300 55 D (GR.150 Z12 M2.1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849