Perko 13" Vertical Fold Down All-Round Boat Navigation LightThis Perko 13" Vertical Fold Down All-Round Boat Navigation Light features a black polymer base as well as a black polymer top with a clear fluted lens & a frosted globe. With an adjustable angle fold-down function, it is for use on windshields, T-Tops, rails, arches and hard tops. Certified for use on power driven vessels under 20 meters (65.6 ft.) in length, this boat navigation light has a reduced glare design and offers exceptional durability and long lasting use.Features: Black Polymer Top With Clear Fluted Lens & Frosted Globe; Black Polymer Base; Fold-Down, Adjustable Angle; Reduced Glare Design; Vertical Mount; Certified For Use On Power Driven Vessels Under 20 Meters (65.6 ft.) In Length; Polymer Adapter Available For Flat Or "V" Type Mounts, Contains Notch For Through-Base Wiring; For Use On Windshields, T-Tops, Rails, Arches and Hard Tops; Specifications: Screw Size: #8; Dimensions: 2-1/4" x 5/8"; Pole: 3/4" Diameter Anodized; Bulb: 12 Volt (Included) ; Click here to download Perko 13" Vertical Fold Down Boat Navigation Light Installation Instructions