Forney 42300 Flux Core Mig Wire, Mild Steel E71TGS.030-Diameter, 2-Pound Spool All position flux core MIG wire for mild steel that is a self shielded and works well on rusty, dirty and painted material Best suited to single pass applications with high travel speed, runs hotter than solid wires Excellent for outdoor windy conditions Although no gas is required, an Argon/CO2 mix will reduce spatter Excellent on 18-Gauge mild steel or thicker