Notes: 3604385M1 COMBI RING 42X62X21.5 SF6 is original AGCO-MF-VALTRA product. 3604385M1 COMBI RING 42X62X21.5 SF61 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849