... shapes,safe using and so on.3.Electric heating pipe is made of high-quality materials and strict process technology ... electric strength . Safe using and reliablity, is the preferred electrical heating pipe for manufacturer of various electric appliances.4. ... : magnesium oxideTube Material: Stainless steel seamless pipe, welded pipe, copper, yellow brass pipe, carbon steel pipeCommon diameter:Φ22,Φ20,Φ18 ...