6 Doors, windows and fixed glazing in the nature of interior metal curtain walls, including components thereof, made of steel, stainless steel or non-ferrous metal alloys; additional profiles being steel profiles for framing glazed partition and doors, including components thereof made of aluminum alloys; Door sills, window sills and shutters, including components thereof, made of steel, stainless steel or non-ferrous alloys; ironwork for windows and doors, namely, window trim, window shutters, window jambs, window fittings, door trim, door, panels, door, frames, door units, door hinges, door fittings, and door surrounds, including components thereof, made of steel, stainless steel or non-ferrous metal alloys; tube and profile systems made of metal composed of precision steel tubes, profile steel tubes, special profile steel tubes, tailored tubes, fixed lengths tubes and components of steel tubes, profiles and pipes; profile steel systems composed of door frames, vent frames, glazing blocks, screw-on hinges, weld-on hinges, locks; profile steel tubes, in particular non-insulated profile steel tubes, for doors, windows and partitions