Tengchang Boat Wakeboard Tower Ski Convex Rearview Mirror w/Black Arm Bracket Anodiz This wakeboard mirror arm is made of 6061 aluminum. The mirror bracket is made to fit 2" or 2 1/4" wakeboard towers Easy to Install and unfold, Used on the wakeboard tower Arm size : Please check the third image Mirror Size: 35cm Wide X 17cm High