s7 tig welder, hf tig/stick/arc tig welder,200 amp 110 & 220v dual voltage tig welding machine s7 【★tig&arc strong point】:inverter frequency up to 100khz, the welding speed is fast, the welding process is the best.this is optimized to deliver a flawless weld, making spatter and post-weld cleanup almost non-existent。rated input frequency 50/60hz, duty cycle 80%,improves the performance of the welding machine 【★feature】:tig/arc 2-in-1, welder size 38cm*16cm*24cm tig& arc welder with tig torch, earth clamp, electrode holder,welding tong 【★portable and powerful】 :tig welding thickness 0.3-4.8mm,stainless steel, alloy steel, mild steel, copper, cast iron and chrome.arc welding thickness 15-42mm 【★energy saving】portable handle makes it easier to operate, the lightweight makes it more convenient to carry。suitable for stainless steel, alloy steel, carbon steel, copper, copper alloy and other non-ferrous metal welding 【★warranty and support】 : 7*24 hours online service, any requests will be answered within 24 hours. accept returns within 30 days. please submit registration form on our website.soudeur soldador.