Cartridge Immersion Heater 1 000 W Watts Sheath Material Incoloy(R) Screw Plug Material Brass Watt Density 157 sq in Heater Voltage 240V AC 1 Phase Overall Length 4 3/8 in Control Range 266 Degrees F 1/2 in NPT Min Immersion Depth 3 1/2 in Flange Material PTFE Includes Brass Screw Plugs