Ram Mount Twist Lock Suction Cup Mount with Universal X-Grip Cell Phone Holder, Black, RAM-B-166-UN7U Socket technology allows for multiple adjustment angles and articulation of device Rubber coated tips will hold device firm and stable Spring loaded holder expands and contracts for perfect fit of your device High strength composite and stainless steel construction.RAM highly recommends using the provided Tether for all open cockpit applications while using this product Powder Coated Marine Grade Aluminum, Marine Grade Stainless Steel Components & High Strength Composite Powder Coated Marine Grade Aluminum, Marine Grade Stainless Steel Components & High Strength Composite 1" Rubber Ball "B" Size Compatible with most all iPhone and touch products and Samsung galaxy s4 Lifetime warranty