Boat/Ski Mirror - Shatterproof 180 Degree convex lens eliminates blind spots. Its compact and lightweight. Self-adjusting, ball-socket joint secures mirror in desired location. Gleaming ZAMAK with Perma-Plate; chrome finish. 2-1/2 inch high ,7-5/16 inch long. Universal mount allows installation on either dash or windshields up to 3/4 inch thick. Adjusts to any position, any angle up or down or side to side.