... steel, alloy steel, copper and other metals. WS-160, WS-200, WS-250, WS-315, WS-400, WS-500 Manuel and argon welding machine1Advanced inverter technology ... .950.950.950.95Welding electrode diameter2.0-4.0mm2.0-5.0mm2.0-6mmTungsten electrode diameter1.0-2.5mm1.0-3 ... .0mm1.0-4.0mm1.0-5.0mm1.0-6.0mmWeight9kg11kg25kg 26kg33kgOverall dimension (package)480*220*295mm570 ...