ZX7 Manual Arc Welder MOSFET Machine, small and light, easily work in high alitude. Be able to weld mild steel, S/S, ZX7 Manual Arc Welder MOSFET Machine, Model: ZX7-315/400/500/630Features IGBT module, high efficiency, high power utilization High welding quality, deep molten pool and strong strength Less splash, good welding surface, low noise ITEMZX7-315ZX7-400ZX7-500ZX7-630Power voltage/ ...