NICHIA A.C. Arc welder can be utilized for all types of manual welding operation on steel structure , brigdes, shipbuilding procedures and so on. The exellent cooling system and class-F insulation strength the durability and quality of the machine. COPPER COIL OFFERS. TOUGH AND ACCURATE WELDING CURRENT! ! ! ! SAFETY DESIGN MAKES SAFETY OPERATION! ! ! 1 YEAR WARRANT