The RAM-B-201, standard double socket arm, has a socket at both ends that accommodates 1" ball bases. A single spring inside the arm opens the end sockets, allowing you to pivot the ball and socket connection. This socket technology allows for almost infinite adjustment and perfect viewing angles. 

Dimensions: 
Overall Length: 3.69"
Socket-To-Socket Length: 3" 

Material: 
Powder Coated Marine Grade Aluminium 

Ball Size: 
1" Rubber Ball "B" Size

Note:
For security purposes a locking knob is available for this arm, part number RAM-KNOB3L