RAM® Double Ball Mount with 1/4"-20 Male Thread - C Size Long iPad Air 4 5" diameter round base with

5" diameter round base with the universal AMPS hole pattern

125" end to end with a 8" socket-to-socket length

The RAM-101U-B-235 consists of a short double socket arm

including Marine GPS

with a drill-down pedistal base and a rectangular base with 1

RAM® Double Ball Mount with 1/4"-20 Male Thread - C Size Long iPad Air 4 5" diameter round base withRAM 101AU D consists of a double socket arm and two 2. 5" diameter round bases that contain the universal AMPS hole pattern. One of those round plates has a 1 4" 20 male threaded post in the center. That threaded post can be removed to reveal a 1 4" 20 female threaded hole.