.035 L-56, 12.5 LB Spool, Superarc Mig Welding Wire, Mild Steel, Premium Copper Coated Mig Wire, An Excellent Choice For Welding On Metals With A Medium To High Presence Of Mill Scale, For Best Performance Use On Clean, Oil Free & Rust Free Base Material, Superior Weld Appearance, Feedability & Excellent Arc Characteristics.