The Auto Arc 130 works off 115-volt household current. - It comes able to weld, devoid of shielding gas, by means of .030?.035 in. (0.8?0.9 mm)flux cored wire. The Hobart auto arc 130 1115vac mig wire feed welder, for the purposes of better adaptability, the Auto Arc 130 consists of a gas valve for welding with.023?030 in. (0.6?0.8 mm) solid wire and gas shielding. Use C-25 gas (75% Argon/25% CO2) on 22 gauge?1/8 in. steel to get a cleaner weld witless spatter. -Use Tri-Mix gas and stainless wire for welding on 16 gauge?1/8 in. stainless steel. This appliance is really a 115Volt electric machine but it welds with gas and without gas. Welder consists of sample spool of Flux core wire and three substitute contact tips.