6 Pipes and piping of non-ferrous metals, metal alloys, steel, particularly finned tubes, capillary tubes, spring tubes, pipes for gas, steam, liquids, water and pipes and piping for gasoline, lubricating and cooling materials; flexible pipes, particularly flexible pipes of metal; containers, tanks made of non-ferrous metals, metal alloys and steel, wires made of non-ferrous metals, metal alloys and steel, particularly welding and soldering wires; sheets, strips, foils, plates, ingots, bars and profiles of non-ferrous metals, metal alloys and steel; construction parts of non-ferrous metals, metal alloys and steel, being rolled, pressed, stamped, cast, extruded and forged; mechanically shaped metals, particularly drilled, turned, milled, pressed, forged and stamped metals; valves, particularly valves for compressed and liquefied gases and for fire extinguishers; springs made of non-ferrous metals, metal alloys and steel