... for MMA, TIG, MIG, air plasma, STUD and submerged welding machines DC Inverter MMA Welding Machi Technical Characteristics:1. Waterproof, anti- ... , high quality and energy-saving.3. Good arc-starting and arc force, anti-sticking.4. High welding quality, deep penetration, ... 3.2Machine case materialSteelSteelPlastic or Steel DC Inverter MMA Welding Machine (welding machine, inverter mma welding machine)