Screw Plug Immersion Heater 4 000 W Watts Sheath Material Copper Screw Plug Material Brass Watt Density 54 sq in Heater Voltage 240V AC 3 Phase Overall Length 17 9/16 in Control Range 60 Degrees to 250 Degrees F 2 in NPT Enclosure Type NEMA 1 Min Immersion Depth 11 in Includes Thermostat