The 3rd generation Aero include upgraded rubber coated clamps along with a newly designed pad which helps 'lock' the mirror into place, even on the newest modern design of car and 4x4 mirrors. Comes with the very best quality glass available for the clearest view of any towing mirror on the market. The Extra Wide Towing Mirrors are essential when towing wide trailers. The arms are approximately 16" as apposed to the standard Aero arms of 12". Includes storage bag