6 Common metals and their alloys; Castings, foils, powder, and rolled, drawn or extruded semi-finished articles of common metals and their alloys; extruded metal, namely, metal profiles made of aluminum and its alloys, metal bars for further manufacture; rolled aluminum and its alloys; ingots, bars, billets and rods of common metal; wire of common metal; sheet metal; aluminum foil; common metals in foil form; metal packaging material namely, foils of metal for wrapping and packaging, flexible metal foils packaging materials for use in the manufacture of pouches, bags and lids and metal packaging trays; strip metal namely, aluminum strip; thin bands of metal; profiles, poles, pipes, rods and tubes of metal; non-electric cables and wires of common metal; aluminum wire; locks, elbows, joints, brackets and couplings of metal for use with metal pipes and tubes; ducts made wholly or principally of metal in the nature of ventilating ducts of metal for trunking pipes or conduits for gases and liquids; metal building materials namely, roofing panels, window frames and window cases of metal; panels of metal for buildings; eaves gutters, spikes, plating and skirting boards of metal; metal doors, windows and blinds and structural parts thereof; metal tubes, safes and boxes; materials of metal for railway tracks; metal masts for power cables; casting moulds and chills, namely, foundry chill-molds; metal ores; apparatus for ventilating, namely, ducts of metal for ventilating installations; metal tubing for heat exchange