Building boards of metal, namely, wall boards of metal; building materials of metal, namely, composite panels composed primarily of metal; building panels of metal, namely, composite panels composed primarily of metal; flashing of metal for building; linings of metal for building purposes; partitions of metal for buildings; sheets and plates of metal for buildings; wainscotings of metal; curtain walls of metal; wall claddings of metal for buildings [ ; pipes of metal; steel pipes; steel tubes ]