Use with these "double socket" arms:
Short B Size
Normal B Size
Long B Size
You can use these mounts for devices:
Go Pro Mount
Phone Mount
Peak Deisgn Phone Mount
The RAM-B-238U consists of a B size 1" diameter rubber ball on a 2.43" x 1.31" diamond plate. The plate has two holes 1.912" from center to center, matches the industry standard AMPS hole pattern and will connect to a large variety of RAM mounts and third party cradles including the TPAM from ExE.