The RAM single swing and socket arm mount includes a 6" STRAIGHT swing arm mounted on a horizontal surface mounting base. At the end of the mount is a rectangular 6.25" x 2" top base. The pivoting point of the rectangle base allows 180 degree rotation, the swing arm allows a 360 degree rotation.

RAM Marine Electronic Mounts Page
RAM-109HSB Dimensions

A. Center of knob to center of ball socket: 6"
B. Overall length of swing arm assembly: 10.75"
C. Height from base to top of knob: 4.89"

Part number reflects product packaged in clear clam shell for store shelf display. For additional specifications, see components and drawings tabs.
Ball Size: 1.5 Inch Rubber Ball
Material: Powder Coated Marine Grade Aluminum
Color: Black Powder Coat