The RAM-B-103-236U consists of a double socket arm and two 1" ball bases with a 3/8"-16 threaded post. Designed into the mount is a 1" diameter patented rubber ball and socket system with adjustment points at both ends of the socket arm; this with a twist of the arm knob allows for you to maneuver the mount to your optimum viewing position.

Material:  
Powder Coated Marine Grade Aluminum 

Ball Size:
1" Rubber "B" Ball Size 

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