TIG Welder For Material Type Stainless Steel Steel For Maximum Material Thickness 3/16 in (Steel) For Minimum Material Thickness 0.020 in (Steel) Input Frequency 50/60 Hz Max Input Current 23.16 A @ 120V (Single-Phase) Phase Single-Phase Polarity DC Series Maxstar 161 STL Stick Welding Maximum Output Current 160 A Stick Welding Minimum Output Current 20 A