Notes: 28611 O-RING 3700 177.47X2.62 is original CARRARO product. 28611 O-RING 3700 177.47X2.625 is commonly used in transmissions/axles/engines 135591, 138620, 138773, 139057, 139058, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849