IMMERSION HEATER IMMERSION HEATER CARTRIDGE IMMERSION DUAL ELEMENTS IMMERSION HEATER WITH SCREW FLANGE IMMERSION HEATER IMMERSION HEATER DOUBLE LOOP IMMERSION HEATER-OVER THE SIDE LIN TYPE IMMERSION SPIRAL WITH COOLING SIX ELEMENTS IMMERSION HEATER TRIPLE ELEMENTS IMMERSION HEATER WITH FLANGE TRIPLE ELEMENTS IMMERSION HEATER