Sealey inverter welder mig tig mma 200a sealey invmig200 p this inverter mig tig and mma 200a from sealey is a high quality unit featuring automatic arc force circuitry for arc welding a variety of rods including rutile basic and stainless from oslash 1 6mm to oslash 4mm p p highly durable courtesy of the pressed steel outer casing the inverter is equipped with a host of outstanding features including the fan cooled dc power supply for mig and tig suitable for welding steel s