Finned Tube Heater is made of high quality stainless steel, high-pure MgO powder, high electric resistance heat sealing material such as stainless steel radiator. Finned Heating Element is designed to improve heat transfer to the air and permits putting more power in tighter spaces, like forced air ducts, dryers ,ovens and load bank resistors. Heat transfer, lower sheath temperature and element life are all maximized by the heater's finned construction.