1,Copper Water heater heating element 2, CE & ISO certificates 3, with/without nickle or silver plating Features Model No.GT-H029MaterialCopperOuter ... anode holewith/without (M5/M6/M8)Remark:1, Our heating elements are available in Copper, SS304, SS 310, SS316, SS321, ... Inconel & Incolloy sheath.2, Every technically possible heater can be custom-made as per your requirement.3, Mg ...