Screw Plug Immersion Heater, 500 W Watts, Sheath Material Copper, Screw Plug Material Brass, Watt Density 45.75 W/sq in, Heater Voltage 120V AC, 1 Phase, Overall Length 9 3/4 in, 1 in NPT, Enclosure Type NEMA 1, Min. Immersion Depth 6 3/8 in, Special Information Corrosion-Resistant Electrical Wiring Hardware, Recompacted Element Bends Restore Insulation Resistance After Forming, Silicone Resin Element Seal Standard, For Use With Clean Water, Non-Corrosive Material, Includes Screw Plug. This item has been restricted from sale in the following state (s): []