The Miller Electric Millermatic 355 MIG Welder is an easy-to-use power source designed for welders of any skill level. It can operate on single-phase or three-phase AC power and provides MIG and pulsed MIG capabilities for mild steel, aluminum, and stainless steel in thicknesses from 22 gauge to 1/2". The Millermatic 355 has a 7" LCD user interface and is compatible with push-pull guns. With Auto-Set Elite, welders can easily select the right parameters to produce high-quality welds. It also features a Program Mode where welders can save up to four frequently used weld processes in the machine.