Cartridge Immersion Heater 4 000 W Watts Sheath Material Incoloy(R) Screw Plug Material Brass Watt Density 194 sq in Heater Voltage 240V AC 1 Phase Overall Length 10 in Control Range 266 Degrees F 3/4 in NPT Min Immersion Depth 9 in Flange Material PTFE Includes Brass Screw Plugs