Notes: 75709.6 O-RING 3150 2-128 37.77x2.62 - is original DOOSAN product. 75709.6 O-RING 3150 2-128 37.77x2.62 -1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849