Notes: 75803.7 O-RING 3137 2-126 34.6x2.62 - is original DOOSAN product. 75803.7 O-RING 3137 2-126 34.6x2.62 -1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849