Screw Plug Immersion Heater, 1,500 W Watts, Sheath Material Copper, Screw Plug Material Brass, Watt Density 84 W/sq in, Heater Voltage 240V AC, 1 Phase, Overall Length 11 5/8 in, Control Range 60 Degrees to 250 Degrees F, 1 1/4 in NPT, Enclosure Type Moisture Terminal, Min. Immersion Depth 9 in, Special Information Rugged Tubular Heating Element, Special Model Selections with Low Water -Off