RAM Mount Standard Double Socket Arm, Long Double Socket Arm & Double Ball Adapter f/1" Balls [RAM-B-201-201U-C] Marine Plumbing & Ventilation 7" square base that contains

7" square base that contains the universal AMPs hole pattern

Power Steer and Jog Steer

Humminbird AutoChart PRO enables you to use Minn Kota i-Pilot® Link™ on previously unmapped bodies of water after you create contours with the revolutionary AutoChart PRO PC Software

5" rectangular base

RAM Mount Standard Double Socket Arm, Long Double Socket Arm & Double Ball Adapter f/1" Balls [RAM-B-201-201U-C] Marine Plumbing & Ventilation 7" square base that containsStandard Double Socket Arm, Long Double Socket Arm & Double Ball Adapter for 1" Balls Consists of a STANDARD LENGTH double socket arm, LONG LENGTH double socket arm and double ball adapter that joins the two arms together. A single spring inside the arm opens the end sockets, allowing you to pivot the ball and socket connection. This socket technology allows for almost infinite adjustment and perfect viewing angles. Dimensions: Standard Double Socket