Features an adjustable mounting ball tension so that it can be tightened up for demanding off-road environment. Only convex in the horizontal direction so that objects appear exactly where they are in relation to your vehicle. Can be post mounted horizontally or vertically with its 3/8"-16 thread post. Easily removable clamp adapter allows mounting with any size clamp. Include Axia Alloys' patented modular roll-cage mounting system. Fits around any cage tubing in 1.5", 1.75", 1.85" and 2.0" OD. Low distortion crystal-clean view. Shatter-resistant glass insert. Offers infinite adjustability. Requires OD size specific strap clamp (sold separately)..