... .Self-shielding type 6.OTC typeC.The welding shows:2.Beijing Essen Welding Fair in Shanghai in June4.CE, certsinfo:Tweco welding torch, Mig torch, welding torch,CO2 welding torch ... .Tweco welding torch 200A,300A,400A,500A1.. CO2 air protective welding torch.5. handle colour could be ...