Forney 42287 Mig Wire, Mild Steel ER70S-6.035-Diameter, 10-Pound Spool All position copper coated welding wire containing a high level of manganese and silicon to produce welds on dirty or rusty steel High silicon content provides fluidity of the weld puddle providing smoother bead appearance and minimizing post weld grinding Superior wire surface finish for best feed ability and arc performance, increased manganese and silicon provide excellent cleaning action Butt and fillet welding of carbon steel sheet and plate in industrial, farm, construction and automotive equipment applications Requires CO2 or Argon/CO2 shielding gas (not included)