"Accept no substitute. The RAM Mounts Marine Electronics Mount delivers the unbeatable strength and ease of movement to make your boating and angling more enjoyable, more convenient, and more successful. Expert-honed ball-and-socket technology allows near-infinite adjustability, allowing you to pick your perfect viewing angle. Powder-coated marine-grade aluminum delivers the durability and reliability you demand for the unpredictable marine environment. This complete, flat-surface, drill-down mounting solution supports your compatible 9""12"" fish finder and other devices for the stablest device mount on the market, without question. Overall height: 15.2"". Plate size: 6.25"" x 2"". Plate diameter: 3.68"". Socket to socket length: 11.41"". Manufacturer's lifetime limited warranty. Ball-and-socket technology for near-infinite adjustability with worry-free securing Powder-coated, marine-grade aluminum D-size socket arm compatible with 9""12"" fish-finder gimbal bracket View the RAM Mounts Kayak and Boat Compatibility Chart."