Notes: 28644 O-RING 2200 2-033 50.52X1 is original CARRARO product. 28644 O-RING 2200 2-033 50.52X15 is commonly used in transmissions/axles/engines 137288, 137784, 137786, 140296, 140297, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849