6 metal materials for structures and buildings, namely, stair treads, metal wainscoting, gratings and lattices for windows, prefabricated terraces and balconies, metal doors for prevention of damage to tunnels, palings and metal fences, shutters for windows or building entrances, tiles for outer walls, steel frames for buildings, hinges, handrails and railings, ceiling plates, door knockers, runners for sliding doors, sash pulleys, doors, door knobs, posts, clapboards, doors for protection against fire, windows, handles for windows, window frames, pulleys for window frames, gates, floors and roof tiles, all of the foregoing being made of metal