Common metals and their alloys; metal building materials, namely, mounting, fastening, supporting, and protecting devices for power, communications, and data supplies, namely, metal cable ties, conduits and trunking, tubes, cable trays, metal pipes and fittings therefor; ironmongery and small items of metal hardware, namely, nails, pins, pipe clips, screws, nuts, washers, clamps and sleeves for wire cables, seals, bolts, brackets, couplings and joints for pipes, trunkings and cable trays, cra...