Powerweld® E71T-GS gasless flux-cored welding wire .030" diameter x 10lb spool. Powerweld® 71TGS is designed for single pass welding of thin-gauge carbon steel, ranging from 3/16" to 22 gauge. This electrode is formulated to weld quite effectively over galvanized material and can be used on certain aluminized surfaces as well. Powerweld® 71TGS requires no external gas-shielding and should be welded with DCEN (straight polarity).