IGBT single tube Inverter DC ARC Welder,140 amp ,High duty cycle ,stable arc,energy saving,economical INVERTER TECHNOLOGY OEM A. Function and ... 3. Easy for arc starting, little spatter, excellent welding performance 4. Stable current, nice welding shape with high quality of welding bead5. Stable ... . One Year Warranty. 3. Technical Support. 4. CCC certificate ARC-160I IGBT Inverter DC ARC Welder