Ideal for vehicle windshields, the RAP-B-166-UN7U consists of a 3.3″ diameterRAM Twist-Lock suction cup base, medium length double socket arm, and thepopular spring-loaded RAM X-Grip phone holder. The RAM X-Grip features an’X’ design that expands and contracts to provide a perfect fit for your device- even if it’s in a case. Made of high-strength composite and stainless steel,this version of the RAM X-Grip fits phones ranging from 1.87″ to 3.25″ inwidth and keeps your device completely functional and accessible. RAM ball andsocket technology allows for near-infinite adjustability to achieve the idealviewing angle – while also extending the life of your phone by providing shockand vibration damping. For outdoor applications, the RAM X-Grip includes adevice tether that is recommended for added security and peace of mind. Spring-loaded ‘X’ design with rubber caps sports great holding power without hiding your phone; includes optional device tether for peace of mind during rugged use Includes RAM Twist-Lock suction cup base ideal for vehicle windshields and medium length, B size RAM double socket arm; ball and socket technology allows for near-infinite adjustability Made of stainless steel components and high-strength composite for durability and reliability in the most demanding environments Backed by a lifetime warranty Components RAP-B-224-IU RAP-B-201U RAM-HOL-UN7BU Hardware Included Assembly Hardware (1) Optional Tether (1) Glue Tube for Rubber Caps Holder Dimensions Width Range: 1.875″ – 3.25″ Depth Range: .875″ max Suction Size 3.3″ Diameter Socket-to-Socket Length 3″ Ball/Socket Size B Size (1″) Weight Capacity 2 lbs Materials High strength composite Stainless steel Weight .65 lbs