Common metals and their alloys; metal building materials and metal building products; painted metal building materials and painted metal products; metal beams, metal supports, metal frames, metallic brackets, metal joists; metal pipes and tubes of metal; metal rectangular hollow section beams including metal rectangular hollow section beams for use in roofing for patios, terraces, pergolas, verandahs and other outdoor constructions; metal rectangular hollow section beams including metal rectangular hollow section beams used in floor joists; extrusions of metal; metallic securing devices; flashings, gutters, downpipes; metallic posts; metal mouldings for building or constructions; small items of metal hardware; parts and accessories for all of the foregoing