We Have this Millermatic 211 with aluminum spool gun added. It is steel capable too. Separate gun for each. No changing wire. Gas is the only thing not supplied.
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Runs off 110 and 220. We bought this set up new last year to help boost production. (we have a larger floor model in shop used daily) We simply do not need this one. It is on an Eastwood cart with drawers for supplies. Gauges and all are only about a year and a half old. Used only a hand full of times at our old shop.
New this set up is currently 2,800. This is a steal at this price and ready to work for you.