... year. 3.Thickness:1.6-5.0mm Inverter DC Arc Welding Machine(ZX7-400) 1.CE,OEM Certificate2.Warranty ... in volume, light in weight and power saved2. easy to arc initiation, resistance to interference , good force adjustment3. Stable welding ... spatter4. Good welding result, deep welding pool, high intension5. Protection for over voltage, over current6. Automatic voltage pulsation compensation capability ...