The RAM-D-202-25-C-202 powder-coated, marine-grade aluminum Humminbird Helix mount 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. 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. Compatible with the Humminbird Helix 8, Humminbird Helix 9, Humminbird Helix 10, and the Humminbird Helix 12.
worked out great, all kinds of adjustments and easy to mount . Also pretty heavy duty..
Well worth the money.