... water heating element/electric heater Quality certification :TUV,UL Kettle used Stainless steel electric heating element Features: 1)heating fast, reliable ... intex: 1) Insulation materials: magnesium oxide2) Tube Material: Stainless steel seamless pipe, welded pipe, copper, yellow brass pipe, carbon ... steel pipe3) Common diameter:Φ22,Φ20,Φ18,Φ16,Φ14,Φ12 ...