National Products RAM-101 Marine Double Arm with Two Pin Locks Compatible Ram Ball 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 The hole pattern found on the round base adapter will connect to many RAM cradles, including all iPad cradles Powder Coated Marine Grade Aluminum The included RAMs patented design dampens shock and vibration, helping to extend the life of your device Overall Height: 7.35"