The HTP MIG 140 is the strongest, feature-packed, industrial 110V MIG welder on the market. Along with outstanding performance, a welding capacity up to ¼" and a duty cycle of 20% @ 140 amps, it also includes a broad lineup of quality features normally found only in larger welders.The MIG 140 boasts features and functions such as spot and stitch welding and a copper wound transformer, copper being a better electrical conductor than aluminum. A cast aluminum wire drive system with geared drive rollers is an additional performance feature of this MIG 140 welder.