The RAM RAM-VP-SW1-89, combination swing arm/tele-pole system, will connect to any RAM vehicle base without a welded female tele-pole. Included is a tele-pole with a height range from 11.5" to 17"; it can be easily adjusted by turning the knob at the top of the post. Once the knob has been tightened, the tele-pole becomes a rigid support for any RAM cradle, holder or Tough-Tray. The double swing arm with rotating plate, allows you to twist and tilt the viewing angle of your laptop, tablet, UMPC, monitor, or any other connected electronic device, when mounted on your RAM Vehicle Mount. Taking the highly successful RAM Vehicle Mounts to the next level, this rotating swivel arm gives you even more viewing positions for your mounted electronic device while holding everything firmly in place. The length of the double swing arm is 12". Material: Powder Coated Marine Grade Aluminum Ball Size: 1.5" Rubber Ball "C" Size Note: Part number reflects product packaged in clear clam shell for store shelf display.