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For sale is a large Hobart Hefty fluxcore wire feed unit. It can be used for welding with flux core. Holds large spools of wire. Note that the 4/0 cable that you see on the picture is not included.
This is a voltage sensing unit, meaning that you can use it with your stick welder. Or you can use it with batteries.
I checked this unit out and found it to be in a running condition, though I have not performed in depth checks. Sold "as described" (meaning that I guarantee that it turns the motor, but do not guarantee anything beyond it). I am not aware of any problems with it.
Could be good for whatever welding machine project you are undertaking.