Refractory construction materials, not of metal; non-metal floors comprised of plastic for office buildings; non-metal floors comprised of plastic for outdoor use; plastic pipes for use as building materials; rubber flooring; roof coverings, not of metal; building materials, not of metal, namely, stone veneers and concrete poles for use as building materials; reinforcing materials not of metal for building purposes; building materials, not of metal, namely, non-metal floors comprised primaril...