The RAM-VB-109-4U consists of two 6" long single swing arms, Tele-Pole&trade  connection hole and single socket that will accommodate 1.5" ball bases. The two swing arms connect with a bolt and knob system. With a simple turn of the knob you can pivot the swing arms at this center point and the tighten the knob to lock the arms in place.

Swing Arm Length:
12"

Material: 
Powder Coated Marine Grade Aluminum 

Ball Size:
1.5" Rubber Ball Size

Note: 
The "U" in the part number reflects product packaged in poly bag.