Welders Inverter Electrode Welding Machine in direct current DC GeoTech WM-160 F – 160 A GeoTech WM-180 F Inverter Electrode Direct Current Welding Machine – 180 A – with MMA Kit GeoTech WM-140 F Inverter Electrode Direct Current Welder – 140 A – with MMA Kit Inverter Electrode Welding Machine in direct current DC GeoTech WM-200 F – 200A – with MMA Kit