Perko 4.5" Fixed Mount All-Round Boat Navigation LightThis Perko 4.5" Fixed Mount All-Round Boat Navigation Light is certified for use on power driven vessels up to 65.6 ft. in length. It is designed for extreme durability against harsh marine environments and offers added protection from corrosion. With a clear fresnel globe, this boat navigation light offers exceptional visibility.Features: Black Polymer Base; Corrosion Resistant; Certified For Use On Power Driven Vessels Up To 65.6 ft. In Length; Clear Fresnel Globe; Protects From Harsh Marine Environments; Fixed Mount; Specifications: Screw Size: #8; Size #2 Pole: 3/4 Diameter Anodized; Bulb: 12 Volt (Included); O.D. Base: 2-1/8"; Click here to download Perko 4.5" Fixed Mount All-Round Boat Navigation Light Installation Instructions