Specifications: ? Quality standard: ISO9002 ? Size :φ 6.5 - φ22, length: 200mm - 5000mm ? Material: stainless steel , brass, titanium, carbon steel. ? Building 、 volt 、 power: according to the customers requirment. ? Safty testing: GB706.1-92. JB4088-85 application: the high-performance electric heating tubes are necessary for various kinds of industrial and family electric apparatus, such as water heasters, drinking machines, air-conditioners, bake ovens and the heating devices for acid, alkali, oil, salt, etc.