RAM Mounts (RAM-B-166-UN10U) Twist Lock Suction Cup Mount with Universal X-Grip Iv Large Phone/Phablet Holder X-Grip Features:1. Rustproof2. High strength composite and stainless steel construction 3. Spring loaded cradle expands and contracts for perfect fit of your device 4. Rubber coated tips will hold device firm and stable 5. Socket technology allows for multiple adjustment angles and articulation of device 6. Includes Tether for open cockpit and extreme environments 7. Lifetime warranty8. Made in U.S.A. Material: Powder Coated Marine Grade Aluminum, Marine Grade Stainless Steel Components & High Strength Composite Ball Size: 1" Rubber Ball "B" Size Note: The "U" in the part number reflects product packaged in poly bag. RAM highly recommends using the provided Tether for all open cockpit applications while using this product. Weight:0.73 lbs.