Over The Side Immersion Heater, 3,000 W Watts, Sheath Material Copper, Screw Plug Material Brass, Watt Density 50.04 W/sq in, Heater Voltage 240V AC, 1 Phase, Overall Length 21 3/16 in, Control Range 60 Degrees to 180 Degrees F, 1 1/4 in NPT, Enclosure Type NEMA 1, Min. Immersion Depth 16 in, Special Information Corrosion- Electrical Wiring Hardware, Recompacted Element Bends Restore Insulation Resistance After Forming, Silicone Resin Element Seal Standard