PERKO White Stern Light is certified for use on vessels 20 meters (164') in length. Black Plastic Base Pre-Wired Double Contact with 3 Feet of 16/3-SJO Cable Watertight Access Cap for Rebulbing and Cleaning 135 Visibility Arc Bulb: 12, 24, 32 or 120 Volt (Not Included) Height Overall: 7-1/2" Height Lens: 4-1/4" Screw Size: 1/4"