Notes: 133758 O-RING 240.9x3.53 2-272 4950 is original CARRARO product. 133758 O-RING 240.9x3.53 2-272 49505 is commonly used in transmissions/axles/engines 132886, 138094, 138111, 138111, 138116, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849