The RAM-B-121-TAB3U consists of a yoke clamp base, double socket arm, diamond base adapter and Tab-Tite™ universal clamping cradle. The clamp base will accommodate rails in diameter from 0.625" to 1.25". The mount is designed with a RAM 1" diameter patented rubber ball and socket system that has adjustment points at both ends of the double socket arm; this allowing for almost infinite adjustment and perfect viewing angles. The spring loaded Tab-Tite™ cradle makes it easy to load and unload your tablet, along with keeping it secure while on the go. Interchangeable cup ends are designed to optimize the functionality of your tablet, allowing access to audio jacks, usb, power, and other ports, your tablet can be used just as it was intended. The included backplate is interchangeable with various size support cups, making it compatible with numerous tablet models. New detachable support cups are the only components needed for purchase, attach to the backplate for support of your new tablet.Clamp Base Dimensions:Accommodates rails from 0.625" to 1.25" in diameterTab-Tite™ Cradle Dimensions:Height: 8.5" minimum to 10.75" maximumWidth: Maximum to 7.75"Edge Depth: Maximum to 0.56"Tab-Tite™ Cradle Features:Support cups contain open slots to accommodate for tablets of various sizesBack plate can support various size support cupsSpring loaded tension provides secure support for your tabletSpring loaded cradle allows for quick release of your tabletHigh strength materials maximize …