Notes: 28521 O-RING 3156 2-129 39.34x2.62 is original CARRARO product. 28521 O-RING 3156 2-129 39.34x2.625 is commonly used in transmissions/axles/engines 137784, 139514, 139514, 139555, 139555, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849