6 Aluminium and its alloys, namely, aluminium as extruded profiles, bars and foil; hinge bands of metal, namely, metal hinges; door and window frames of metal; greenhouse frames of metal; building elements of metal, namely, metal building flashing, building wall framing made primarily of metal, metal reinforcement materials for building; window casement bolts of metal; staircases of metal; alloys of common metal, unwrought or semi-wrought metals; floors of metal; small hardware of metal, namely, metal bolts; common metals, unwrought and semi-wrought for further manufacture; verandas of metal; doors of metal; door frames and casing of metal; door fittings of metal; door panels of metal; windows of metal; window frames of metal; window shutters of metal; fences panels of metal; facades in the nature of metal wall panels, walls panels and curtain walls of metal; safety barriers of metal for swimming pools; sliding sash units of metal, namely, metal window sashes; stops for sliding sash units of metal, namely, metal sash locks, metal sash fasteners for windows