RAM® Double Socket Arm Adapter with Medium & Long Arms - B Size RAM-B-138U The RAM-B-139U-A consists of a

The RAM-B-139U-A consists of a medium length B-size double socket arm

The RAM-B-138-UN7-225B2U consists of a 2

A release button

SHORT CHROME double socket arm and diamond adapter base

RAM® Double Socket Arm Adapter with Medium & Long Arms - B Size RAM-B-138U The RAM-B-139U-A consists of aThe RAM B 201 201U C consists of a standard length double socket arm, long length double socket arm and double ball adapter that joins the two arms together. 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.