The listing is for one pair of one of the fully adjustable Mini Bar End Mirrors, made entirely of aluminum.
These mirrors are made of a frame that will resist vibrations. The mirrors are 3" (76mm) Diameter and have bar ends that will fit standard hollow 7/8" diameter bars or they can clamp around most standard bar end finishers.
Mirrors will fit motorcycles with 7/8 hollow bars or clip-on bars with an internal diameter 14mm-18mm ID hollow bar ends via the expanding collars. (Some bars feature threaded inserts that you may have to drill out for installation)