The king of mirrors this 17" billet panoramic rearview mirror offers the widest non distorted viewing angle of any mirror on the market. This mirror is very slighly curved ONLY in the horizontal direction so that you get a nice wide view of what is behind you without distortion. This is the SHORT ARM version. 1.5" mounting length Axia alloys recommends that you use the 1.5” length arms on aftermarket cages where the mounting bar is far enough in front of you Use 1.5" arms on the following OEM cages Polaris Rzr, xp, rzr 4, polaris ranger We offer a lifetime warranty on all our mirrors. FREE REPLACEMENT of your mirror insert.