Compact navigation lights with a modern look perfect for boats up to 39'4" (12 meters) in length. Completely waterproof, yet vented casings are made from impact and UV resistant polycarbonate. This break-resistant and wear proof polycarbonate housing snaps together without screws for easy assembly. Bulb snaps into a holder supported above condensing surfaces. 10W bulbs in masthead are visible from two nautical miles. Key Features Rubber grommet insulate wires from sharp edges Polycarbonate case is shatterproof, shock resistant and UV resistant Screws included Two flat plug connectors, 6.3mm United States Coast Guard approved