CIPA's Vision 180 Degree- Large black 18.625" x 5.625" Marine Mirror provides full 180 Degree range of Port to Starboard Rearview Vision with convex safety glass. It's Clam shell bracket design accommodates most windshield trim sizes and shapes. The Deluxe Cast Aluminum Cup mounting bracket is durable with lightweight construction for years of carefree use, and also provides 120 Degree of adjustment for foldable storage. Package includes: 1 Vison 180 Degree Marine Mirror with Deluxe Cast Aluminum Clam shell cup mounting bracket. Some Assembly Required. No drilling for easy installation.