my factory make the welding contact tip ,tip holder ,swan neck , liner and so ... ,36KD,501D,602 WELDING TORCHS,2) PANA200A,350A,500A,WELDING GUN.3) OTC200A,350A,500A4) MILLER FLUX-CORD WELDING TORCH.5 ... AND DRAWING.7) WELDING SAMPLE IS AVALIABLE FROM US. welding gun spare parts