6 Ores of non-precious metal; common metals and their alloys and semi-finished products made of these materials, namely, aluminum plates, steel sections; goods and materials of common metals, namely, bins and box of common metal used for storage, containers of metal for storage and transporting, transportable buildings of metal, frames of metal for building, poles of metal for building, metal boxes for packaging, packaging containers of metal, aluminum foil, fences made of metal, guard barriers of metal; metal tubes, storage containers of metal, metal containers for the transportation of goods, ladders of metal; doors, windows, shutters, jalousies and their cases and fittings of metal; non-electric cables and wires of metal; ironmongery, small hardware of metal; ventilation ducts, vents, vent covers, pipes, chimney caps, manhole covers, grilles all of the foregoing made of metal for ventilation, heating, sewage, telephone, underground electricity and air conditioning installations; non-luminous and non-mechanical metal panels and boards used for route showing or publicity purposes, namely, signboards of metal, advertisement columns of metal, signaling panels of metal, non-luminous and non-mechanical traffic signs of metal used for route showing or publicity purposes; pipes of metal for transportation of liquids and gas, drilling pipes of metal and their metal fittings, metal valves, not being parts of machines, couplings of metal for pipes, elbows of metal for pipes, clips of metal for pipes, connectors of metal for pipes; safes and strong boxes of metal; metal rails, metal railway ties, railway switches; bollards of metal, floating docks of metal, mooring buoys of metal, anchors; metal moulds for casting, other than machine parts; works of art made of common metals or their alloys; bottle caps of metal; metal poles; metal pallets and metal ropes for lifting, loading and transportation purposes; wheel chocks made primarily of metal; nonmovable and movable prefabricated structures made of metal in the form of kitchens, modular structures; containers of metal for transport and storage, building panels of metal