1,Copper Water heater heating element 2, CE & ISO certificates 3, with/without nickle or silver plating Features Model No.GT-H028MaterialCopperOuter Diameter8.0mm-8.5mmVoltage220V-240V/50HZ, 110V/60HZOutPut Power1000W-3000WFlange1 1/4’’ brass flangeMg anode holewith/without (M5/M6/M8)Remark:1, Our heating elements are available in Copper, SS304, SS 310, SS316, SS321, Inconel & Incolloy sheath.2, ...