PERKO
LIGHT MASTHEAD CHROME
USCG Certified for use on sail or power driven vessels under 20 meters (65.6 ft.) in length. 3-mile visibility. Chrome plated zinc alloy with black plastic base. Clear lens. 12V bulb included. Vertical mount. Screw size is 4. Housing Chrome Size 3-3/4" L x 1-1/2" W