RAM® Double Socket Arm with Metal Knob - C Size Medium RAM-103-238U The included C size short

The included C size short single socket arm can be attached to the RAM® C size wheelchair track base (sold separately)

5" NPT male thread

The RAM-101U-ZE1 consists of a medium length double socket arm

as well as the short and standard length rod holder post extenders

The RAM-202U-12 contains a 1

RAM® Double Socket Arm with Metal Knob - C Size Medium RAM-103-238U The included C size shortThe RAM 201MU, standard double socket arm with metal knob, has a socket at both ends that accommodates 1. 5" 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.