Securely mount your Humminbird Helix 5 GPS to your boat with the 1.5" Ball Mount Kit with 2.5" Round Base & 1.5 x 3" Plate from Ram Mounts. The round 2.5" diameter round base features the Universal AMPs Hole Pattern to fit a number of applications without the need to drill holes. The rectangular base contains four holes with a center to center pattern of 1 x 2.5", matching the base of the Humminbird Helix 5 GPS. The double socket arm can be easily configured to provide an optimum viewing angle, and can support up to 10 pounds. Corrosion-resistant aluminum alloy and composite materials help shrug off the effects of a life near the water. Made in the USA, this item comes shipped in clam packaging. Installation hardware is not included with purchase.