Electrolytic copper; laths of metal; poles of metal; sheets and plates of metal; posts of metal; ingots of common metal; alloys of common metal; bronze; brass, unwrought or semi-wrought; common metals, unwrought or semi-wrought; copper, unwrought or semi-wrought; poles of metal, for electric lines; posts of metal for electric lines; copper wire, not insulated; ores of metal