Common metals and their alloys; metal building materials, namely, bolts, screws, clamps and metal structures for mounting solar panels, heating, air conditioning and ventilation installations, water storage and circulation systems, water pumps and components of all the foregoing; transportable building constructions of metal; materials of metal for railway tracks; non-electric cables and wires of common metal; ironmongery and small items of metal hardware, namely, bolts, screws and clamps; pi...