Notes: 75860.7 PLUG UNI 5866 D42X12 FeP 02 UNI 5866 is original DOOSAN product. 75860.7 PLUG UNI 5866 D42X12 FeP 02 UNI 58661 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849