Notes: 28120 O-RING 4100 24.99x3.53 is original CARRARO product. 28120 O-RING 4100 24.99x3.535 is commonly used in transmissions/axles/engines 132455, 137379, 137525, 138094, 138117, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849