Perko fold-down all-round pole light with adjustable angle is for use on windshields, T-tops, rails, arches, and hard tops. Horizontal mount application. Reduced-glare design. Black polymer top with clear fluted lens and frosted globe and black polymer base. Durable anodized pole. Includes 12V bulb. Uses #8 screw size. Base: 2" x 1-1/2". Pole: 3/4" diameter. 13-3/8"H. Certified for use on power-driven vessels under 65.6' in length.