This is a extendable mirror arm that is option 9'' to 13'' . It bolts on the upper hinge and would require a longer pin which is B-508 and special short bolt B-568 not included. They will come unpainted. This mirror bracket will work on left or right side of truck. We also offer a 14"-23" . These fit 1939-1947 Dodge and Fargo trucks and also for the 1946-1968 Flat fender Power Wagons.