The RAM-202-24-202, powder coated marine grade aluminum mount, consists of a double socket arm mount, one round 2.5″ diameter round base with the universal AMPS hole pattern and one 2″ x 4″ rectangular base. Rubber ball, socket technology dampens shock and vibration, as well as allows for almost infinite adjustment, perfect viewing angles.Compatible Devices: Humminbird Helix 7Overall Length: 7.35″Weight Capacity: Up to 10 lbs.