Common metals and their alloys; laths of metal; metal roofing; metal wainscotting; metal reinforcement materials for building; metal cladding for construction and building; metal tiles; pipes of metal; ducts and pipes of metal for central heating installations; valves of metal other than parts of machines; Pipework of metal including those from alloy steel and titanium, metal pipes and fittings therefor; joints of metal; safety boxes; tanks of metal; hardware of metal, namely, washers, nuts, bolts, screws, rivets, nails and springs