Hella Marine Light, Starboard, 1 NM, Black. For use on vessels under 39. 4 feet in length. One nautical mile. Compact lamps for direct attachment or with deck or rail mount brackets. Sea-waterproof and anti-magnetic. Snap-lock housing. Cables can be connected from the rear. Black housing. 12V/10W SV8. 5 bulb included. Size: 2"D x 2-1/2"W x 3"H.