RAM® Track Ball™ Composite Universal Marine Electronic Mount RAP-114-PSP-4-12-A-GOP1 The RAM-B-101-A-24U consists of a

The RAM-B-101-A-24U consists of a short length B-size arm with a 2

The answer is simple

6 inch double socket arm and 4

The RAM-HOL-TABL12U consists of a spring loaded backplate

for 1" (B size) socket arms

RAM® Track Ball™ Composite Universal Marine Electronic Mount RAP-114-PSP-4-12-A-GOP1 The RAM-B-101-A-24U consists of aThe RAP B 111B 354 TRA1U consists of a Track Ball base, composite double socket arm and 6. 25" x 2" rectangle plate. The 6. 25" x 2" rectangle plate 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. The Track Ball base can connect to virtually any track system including the RAM Tough Track.