Sheets of cast iron; steel sheets; steel pipes; building boards of metal; stop collars of metal; stops of metal; strap-hinges of metal; brackets of metal for buildings; framework of metal for buildings; fittings of metal for buildings; buildings of metal; joists of metal; linings of metal; nuts of metal; pillars of metal for buildings; poles of metal; posts of metal; props of metal; sheet piles of metal; sheets and plates of metal; trellis of metal; tubes of metal