USCG approved for vessels up to 65 (20 meters). Non-magnetic and saltwater resistant. Bulb included. Fasteners not included. Size\" 3.6 W x 3.2 D x 4.1 H. Model # 41500-7 Features: For Power & Sail boats up to 65 (20 m) Non-corroding fiberglass reinforced polycarbonate housing Side screens are non-magnetic stainless steel. Acrylic Fresnel lens. Bulb: 10 watt/12 volt included Wires exit from rear of fixture « less