RAM® Universal Marine Electronic Mount - B Size Short RAM-101AU-D 5" diameter round base with

5" diameter round base with the universal AMPS hole pattern and 2

This C size short double socket arm includes a RAM® Pin-Lock™ locking knob for theft deterrence

Both bases have the AMPS hole pattern

The RAM-251-1SA is a 9" x 9" aluminum base withe the universal AMPS hole pattern

5" diameter round base the contains the universal AMPS hole pattern

RAM® Universal Marine Electronic Mount - B Size Short RAM-101AU-D 5" diameter round base withThe RAM B 111U A consists of a short double socket arm, 2. 5" diameter round base and 6. 25" x 2" rectangle base. The round base contains pre drilled holes, including the universal AMPS hole pattern. 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.