Notes: 33466 O-RING 6-345 N0552-90 is original CARRARO product. 33466 O-RING 6-345 N0552-905 is commonly used in transmissions/axles/engines 139376, 140975, 141197, 141199, 142268, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849