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The easy to adjust knob allows for near-infinite adjustability
The ball base is made from a lightweight marine grade aluminum with powder coat
This arm includes a 4" long bolt
an 18 inch NPT metal pipe with a 6 inch double socket arm attached to it and finally a 2
5" diameter rubber ball
RAM® Double Ball Mount with Two Marine Electronic Plates Vision 12" The easy to adjust knobThe RAM 133A mount consists of the 1. 5 inch diameter ball and socket system with universal 6. 25 x 2 inch rectangular base ends. The bases have many different combinations of pre drilled holes which will match up to many electronic devices and mounts, including Marine GPS, CB Radios, Ham Radios and Gimbal Brackets.