The RAM-B-189-PIV1-UN11U consists of a dual articulating 3.3" twist lock suction cup base, double socket arm, and universal X-Grip cradle for 12" Tablets. The dual articulating suction cup base is an amazing innovation in suction cup mounting. With the ability to independently articulate each suction cup, this mounting base can be used in a variety of applications such as curved windows and surfaces. Included are extra easy access grip knobs, located on the back of the cradle for quick release of your tablet. The X-Grip cradle is compatible with devices that will fit the dimensions listed below. It is important to verify the dimensions of your handheld device with a case/sleeve/skin when determining the overall size.