The RAM-101U-ZE1 consists of a double socket arm, two 2.5" diameter round bases that contain the universal AMPS hole pattern and hardware to attach to the Zebra RW 420 printer. The mount is designed with a 1.5" 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 included RAM’s patented design dampens shock and vibration, helping to extend the life of your device.