Notes: 28531 O-RING 2-015 2056 14X1.78 is original CARRARO product. 28531 O-RING 2-015 2056 14X1.785 is commonly used in transmissions/axles/engines 139599, 139600, 144075, 146695, 148918, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849