The nickel chrome wire wrapped around a magnesium oxide core is situated in a peripheral position, with a very thin compressed insulating layer between wire and sheath. This allows efhcacious heat exchange, thus maintaining the temperature of the resistance wire at a much lower level compared to other heating elements where the wire is situated in the center. Furthermore, not only do they owe total reliability to the use of advanced technology and precise inspection techniques during manufacture, but also to the use of Hrst-class material from the best sources on the market.