... at least 3suitable for TIG, MIG, MAG,Arc welding 4CE auto-darkening welding helmet,darkening welding mask.Specifications:Filter size 110 ... 420gSuitable for ARC, TIG, MIG, Spot, Micro, Wire, AC, DC, and Plasma Welders and Plasma CuttersOther type: welding helmets auto-darkening industrial lwelding mask