Black composite cam-lock base and anodized aluminum pole. Horizontal mount with rail adaptor. Robust design provides easy, single-handed cam-lock operation. 3 mile, 360° visibility. For use on boats up to 65.6 ft. (20 meters). Installs with two required #10 fasteners. Length 12″. Base dimensions: 3.50” x 1.52”. Uses (2) festoon-style 8-watt lamps. 12 volt.