Chromed stem with spring-back mechanism. The stem is 115mm long overall but the verticl height (rise) is 105mm. This stem rises vertically relative to the base viewed from the side, but slopes out viewed from the front or back with the top of the stem 60mm further out (offset) than the base. Requires a 16mm diameter fixing hole. Including chrome nut to fit mirror heads CMT50101, CMT50201 & CMT50311. Can be used on the left or right side. Each