6 Common metals and their alloys, in the form of sheets, rods, bars, and billets, tubes, extrusions for further manufacture, bands, profiles, rails; metal building materials, namely, soffits, fascia, metal cladding, bars, beams, rods, tubing, connecting bars, connecting rods, tensioning anchors, base plates, casings, couplings, gutters, drainage pipes; metal window frames and door frames; metal insulted glass hardware, namely, spacer frames, muntin bars, air spacers, steel profile reinforcements; non-electric cables and wires of metal; small items of metal hardware, namely, pulleys, springs, nuts, washers, screws, stirrups, clamps, metal connectors for window frames, and door frames; pipes and tubes of metal; connectors of metal or of metalliferous composite material for hollow profiles of frames, bars or muntin bars for insulated glass panels