Gasless flux-cored MIG welding wire comes on a 10-pound roll. This 0.035-inch wire has an AWS classification of E71T-GS AWS. It's designed for projects that involve lap welding and single-pass fillet welding. The MIG welding wire is self-shielding, so welding protection gases are not needed. This welding wire is vacuumed packaged and has an aluminum film for resistance to moisture in the environment. MADE IN THE USA!