humminbird helix 9

This powder-coated, marine-grade aluminium RAM Mounts Drill-Down Double Ball Mount for Humminbird Helix 9, 10, and 12 consists of a short length double socket arm, a 3.68″ diameter round base with a 2.25″ D size ball, and one 1.5″ x 4.5″ rectangular plate with a 2.25″ D size ball. The round plate contains two mounting holes at 180-degrees and three mounting holes at 120-degrees. The 1.5″ x 4.5″ rectangular plate contains a 4-hole pattern compatible with Humminbird 8, 9 & 10 models. The rubber ball and socket technology provides shock and vibration damping and allows for near-infinite adjustability so you can position your device at the perfect viewing angle.