Ess Bee Electricals offers Cartridge Heater with Heavy Duty Construction. Ess Bee Electricals manufactures a range of Domestic Elements for home appliances, Industrial Immersion heaters for oil, Water, Chemicals, Cartridge Heaters for moulds and dies, Tubular / finned Air Heaters / Casted Heating Units, Mica, Band, Ceramic Band. The Cartridge Heater with Heavy Duty Construction is usually tubular and is inserted into drilled holes of metal blocks for heating. The Cartridge Heaters are designed for operation up to 230V for Single Phase supply and up to 440V for Three Phase supply.