Autmomatic Bushing Immersion Heater, 1,500 W Watts, Sheath Material Copper, Screw Plug Material Brass, Watt Density 41 W/sq in, Heater Voltage 120V AC, 1 Phase, Overall Length 14 1/8 in, Control Range 110 Degrees to 190 Degrees F, 1 in NPT, Enclosure Type Moisture Terminal, Min. Immersion Depth 10 1/8 in, Special Information Rugged Tubular Heating Element, Special Model Selections with Low Water -Off