The RAM-B-166-UN9U consists of a 3.3″ diameter suction cup twist lock base,double socket arm, round base adapter and universal X-Grip clamping cradle for 7″-10″ tablets. The suction cup base is designed to have a strong hold on glassand non-porous plastic surfaces. The mount is designed with a RAM 1″ diameterpatented rubber ball and socket system that has adjustment points at both endsof the double socket arm; this allowing for almost infinite adjustment andperfect viewing angles. The X-Grip clamping cradle consists of a compositespring loaded cradle, expandable grip arms and additional bottom supportkeeper. Included are extra easy access grip knobs, located on the back of thecradle for quick release of your tablet. The X-Grip clamping cradle expandsand contracts for perfect fit of most 7″-10″ tablets with or without sleeves, aswell as some smaller tablets. Please verify dimensions of your tablet below forcompatibility with the X-Grip. The X-Grip cradle is compatible with handhelddevices that will fit the dimensions listed below. It is important to verifythe dimensions of your handheld device with a case/sleeve/skin when determiningthe overall size. Spring-loaded ‘X’ design with rubber caps sports great holding power without hiding your tablet; fits most 9″-10″ tablets 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 powder-coated, marine-grade aluminum, stainless steel components, and high-strength composite for durability and reliability in the most demanding environments Backed by a lifetime warranty Materials: Marine-grade aluminum, High strength composite Weight Capacity: 2 lbs RAM-B-166-UN9U Part Informaton: Fits: 9″ to 10″ Screens Components: RAM-HOL-UN9U, RAM-B-202U, RAM-B-201U, RAM-B-224-1U Hardware Included: Assembly Hardware Holder Dimensions Max Height: 10.25″ (using optional supports) Width Range: 6.25″ – 8.1″ Max Depth: .875″ Suction Size: 3.3″ Diameter Socket-to-Socket Length: 3″ Ball/Socket Size: B Size (1″) Weight: 1.74 lbs RAM-B-166-UN8U Part Information: Fits: 7″ to 8″ Screens Components: RAM-B-224-1U, RAM-B-201U, RAM-HOL-UN8BU Hardware Included: Assembly Hardware: (1) Optional Tether, (1) Glue Tube for Rubber Caps Width Range: 2.5″ – 5.75″ Depth Range: .875″ max Suction Size: 3.3″ Diameter Socket-to-Socket Length: 3″ Ball/Socket Size: B Size (1″) Weight: .82 lbs