Notes: 75822.7 STUD ACCIAIO CL. 8.8 UNI EN 20898 B5-CAR is original DOOSAN product. 75822.7 STUD ACCIAIO CL. 8.8 UNI EN 20898 B5-CAR1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849