6 Common metals and their alloys, unwrought or semi-wrought, for further manufacture; [ metal building materials, namely, profiled metal sheeting, metal roof and wall cladding, metal roof and floor decking, flooring, roofing, walling, cladding, fencing, metal panels, purlins, girts, beams, joists, stumps, bearers, studs, noggings, bracing, brackets, lintels, sills, window and door frames, doors, metal guttering and down pipes, flashing, capping, nails, screws, bolts, rivets, hinges, locks, materials of metal for railway tracks; non-electric cables and wires of common metal, pipes and tubes of metal; ] common metals and their alloys, namely, ferro-alloys containing chromium, manganese, silicon, nickel, titanium, tungsten, molybdenum, vanadium, boron, phosphorous, cerium, niobium, aluminum or silicon magnesium; common metals and their alloys, namely, casting ferro-alloys and deoxidizing ferro-alloys; copper ores, iron ores, tin ores, mercury ores, zinc ores, lead ores, aluminum ores, cobalt ores, nickel ores, chromium ores, tungsten ores, titanium ores, potassium ores, sodium ores and silicon ores [ ; goods of common metal not included in other classes, namely, sheets, coils, strips, plates, bars, blooms, billets, metal in rod form, ingots, metal in mesh form, metal rainwater tanks, metal posts, clips of metal for use in building construction, wire, rail, metal ties for use in building, metal ties for binding, metal railroad ties, metal ties for cavity walls, metal ties for use in brick work, metal ties for wrapping, metal wall ties and metal form work ties, pipes and tubes ]