Vertical, Flush Mount Transom Light, 304 stainless steel with a plastic body and watertight lamp socket. The Round transom light body is translucent so it shines on both sides of a bulkhead! It can be used to light an interior compartment and may also be used as a cockpit courtesy light. Rubber gasket seals lens and body to mounting surface. Includes one 7.5-watt lamp and two stainless steel #10 screws. Light provides 2-mile, 135 degree transom visibility for pleasure craft up to 164 ft. (50 meters) in length.