Notes: 28486 O-RING 2-22 25.12x1.78 2100 is original CARRARO product. 28486 O-RING 2-22 25.12x1.78 21005 is commonly used in transmissions/axles/engines 643805, 643807, 644154, 644154, 643807, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849