Notes: 25581 SPLIT PIN UNI 1336 5X50 is original CARRARO product. 25581 SPLIT PIN UNI 1336 5X505 is commonly used in transmissions/axles/engines 140490, 140491, 144515, 145006, 146050, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849