RAM® Universal Marine Electronic Mount with Key Lock Knob RAM-109H-3B The RAM-138-UN7U consists of a

The RAM-138-UN7U consists of a round flat plate

including RAM-PA82XX rigid arms

5" diameter ball and socket system with one open socket end

C size double ball mount

9 inch double socket arm and 6

RAM® Universal Marine Electronic Mount with Key Lock Knob RAM-109H-3B The RAM-138-UN7U consists of aThe RAM 111U DL consists of a 2. 5" diameter round base that contains the universal AMPs hole pattern, 9 inch double socket arm, locking knob and 6. 25" x 2" rectangle base. The rectangle base contains different combinations of pre drilled holes which will match up to many electronic devices and mounts, including Marine GPS, CB Radios, Ham Radios, Gimbal Brackets and more.