LINCOLN SP-140T WIRE FEED WELDER K2688-1 Free Shipping to 48 Continental States! Three Year Lincoln Warranty/90 Days on gun and cable assembly. Wide 30-140 amp welding output range. MIG weld 24 gauge up to 10 gauge (.135") sheet metal in a single pass. Weld up to 5/16" steel using self-shielded Lincoln Innershield wire (FCAW-S).