Notes: 485968 O-RING 183.74 FKM 90 SHORE A x3.53 (2-26 is original CARRARO product. 485968 O-RING 183.74 FKM 90 SHORE A x3.53 (2-261 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849