CIPA 11140 Safety Rearview Marine 4" x 8" Mirror Features a fully adjustable anti-scratch, quick mount plastic bracket that fits round or square windshields from 0.625 of an inch to 1 inch thick Can mount above or below the windshield Features a convex acrylic safety lens for wide angle viewing and added safety Mirror head measures 4.25 x 8 inches Made with non-corrosive materials and salt spray tested