For use on boats up to 39.4' in length, provides 1 mile visibility. Twist/bayonet lock design secures lens and cover to base. Includes an 8 watt wedge base lamp and 7" wire leads for connection to 12 VDC power supply. Install directly to deck with (2) #10 fasteners. Cover and lens conceal installation fasteners and seal out water. Combination lights are visible 225°, port and starboard are 112.5°.Size: 2-3/8" dia. x 1-7/16"vH.