Flux core wire?

This would probably be the case. As for wire go with .030 as it is the smallest diameter flux core wire you can purchase and this machine only has 125 amps on its best day. You will run into the duty cycle with this welder. Buy the Lincoln 211 wire at either Home Depot or Lowes. By the way I'm a welding instructor and have been a welder for more than 30 years. Also as said above buy a quality hood. At the college I teach at we highly advise to not use the HF hood.
Kevin
Thanks I will look for the Lincoln brand i have read it's a lot better than the hf brand wire. As for the duty cycle I'm not all that worried about it I just use it for little jobs around the house nothing i can't walk away from for 10 mins. I knew when I posted this I was gonna get a lot of hate mail about the machine but I just needed something to stick two pieces of metal together a few times a year I don't weld enough to justify spending 200 300 400 + on a welder for under 100 bucks this machine works flawlessly for my intended purpose. I don't weld every day and I don't weld for a living. Just wanted something for home maintenance.