Notes: 28530 O-RING 4312 2-235 78.97X3 is original CARRARO product. 28530 O-RING 4312 2-235 78.97X35 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