6 Building materials made of metal, namely, profiles, tubes, plates, sheets and foils for windows, doors, gates, staircases, balconies, facades, skylights; metal building materials, namely, windows, doors, gates, stairs, partition walls, facades, balconies, prefabricated conservatories, roofs, window, door and collector frames and prefabricated parts therefore; metal building materials, namely, shutters, windowsills, rain-leading sheets and profiles [, mailboxes, fences, scaffolds ]; metal hardware, namely, nuts and screws; metal seals; [ metal locks and ] parts therefor for windows, doors [ and gates ]; [ transportable metal exhibition stands, ] all of the foregoing goods made wholly of metal or substantially of metal in combination with glass, wood or plastic