... , 4.5mm X 4.5mm.. 2,100W-1800W 230V hot spring heaterhot runner coil heater may be bent into shape, the ... chooses CrNi steel, internal insulating materials for high purity magnesia, spring heating circle by high temperature bake and become, its full ... heating contact area, has high heat conduction, spring heating circle mechanical impact resistance to high temperature, strong work ...