... JIS,EN,TP304,321,316L.... Appliance:high quality electric element,heater O.D.:from 6mm to 23 Features: ... heaters, air-conditioning, refrigerators and other household appliances, electric heating, etc.4) Specification range:outer diameter:6mm- ... In response to customers' requirements for the electric heating tube manufacturing process, we havr worked out ... . sell stainless steel pipes for electric heater