Hot Max 23112 0.035-Inch E71T-GS Flux Core MIG Wire - 2# E71T-GS alloy is a high strength flux core wire which produces a deep penetrating weld without shielding gas Tensile Strength: 80, 000 PSI Shielding Gas: None Required but 75% CO2/25% Argon will reduce spatter Machine Polarity: DCEN Straight Polarity With 2 Pound Spool