Screw Plug Immersion Heater 7 500 W Watts Sheath Material Copper Screw Plug Material Brass Watt Density 65 sq in Heater Voltage 240V AC 3 Phase Overall Length 22 9/16 in Control Range 60 Degrees to 250 Degrees F 2 in NPT Enclosure Type NEMA 1 Min Immersion Depth 16 in Includes Thermostat