Common metals and alloys of common metals; metal building materials; metal extrusions; windows and screens of metal or predominantly of metal, including aluminium and aluminium alloys; frames, panels, surrounds, cases, closers, fittings, tracks, handles and accessories for windows, wardrobes, doors and screens of metal or predominantly of metal; wardrobe parts, fittings and accessories of metal or predominantly of metal; doors in this class; doors of metal or predominantly of metal, including folding doors, multi-fold doors and hinged doors