6 METAL BUILDING MATERIALS, IN PARTICULAR STRIPS, PIPES, PLATES, SHEETS AND FOILS OF METAL FOR WINDOWS, DOORS, GATES, STAIRS, BALCONIES, FACADES, SKYLIGHTS, SOLAR COLLECTORS AND MOULDINGS; TRANSPORTABLE STRUCTURES OF METAL; CONSERVATORIES AND GREENHOUSES OF METAL; GREENHOUSES, TRANSPORTABLE, OF METAL; FRAMES OF METAL FOR BALCONIES, WINDOWS, DOORS AND GREENHOUSES; THIN INSULATING PROFILES OF ALUMINIUM FOR DOORS AND WINDOWS; WINDOWS OF METAL; ALUMINIUM WINDOWS; PATIO DOORS OF METAL; WINDOW FRAMES OF METAL; DOORS, GATES, WINDOWS AND WINDOW COVERINGS OF METAL; METAL COMPONENTS FOR WINDOWS; METAL WINDOW TRIM; INSECT SCREENS OF METAL FOR WINDOWS; MOULDINGS OF METAL FOR WINDOWS; HINGES OF METAL FOR WINDOWS; FITTED WINDOWS (METAL -); ALUMINIUM PATIO DOORS; SQUARES OF METAL FOR WINDOWS; METAL LOCKS FOR WINDOWS; NON-ELECTRIC DEVICES FOR OPENING AND CLOSING WINDOWS; SLIDING DOOR OR WINDOW SYSTEMS OF METAL, IN PARTICULAR WITH SMALLER MOULDINGS OR FRAMES; THE AFORESAID GOODS BEING PREDOMINANTLY MADE FROM METAL, AND METAL IN COMBINATION WITH GLASS, WOOD OR PLASTIC MATERIAL