6 METAL BUILDING MATERIALS, NAMELY, DOORS AND WINDOWS MADE OF METAL, METAL FITTINGS FOR DOORS AND WINDOWS, NAMELY, DOOR-CLOSERS, BOTTOM FITTINGS, TOP FITTINGS, TOP PIVOTS, LOCKS AND HANDLES, IRONMONGERY AND SMALL ITEMS OF METAL HARDWARE, NAMELY, DOOR-CLOSERS, BOTTOM FITTINGS, TOP FITTINGS, TOP PIVOTS, LOCKS AND HANDLES