Notes: RI-661162 WASHER 12.5X52X5 41Cr4 UNI-EN 10083 - is original CARRARO product. RI-661162 WASHER 12.5X52X5 41Cr4 UNI-EN 10083 -1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849