The RAM double swing arm mount includes two 6" long bent swing arms mounted on a horizontal surface mounting base. At the device mounting end is a rectangular 6.25 x 2" top base. The pivoting points of the mount allow a complete 360 degree rotation. RAM-109H-1 Dimensions A. Overall length: 16.69" B. Overall height: 8.577" C. Height from bottom of base to top of knob: 4.89" Ball Size: 1.5 Inch Rubber Ball Color: Black Material: Powder Coated Marine Grade Aluminium Components RAM-109H-B RAM-111BT