Drainpipe, not of metal, for building; flashing, not of metal, for building; fire-resistant boards and panels, not of metal, for building; reinforcing materials, not of metal, for building; materials of rubber exclusively for building or construction, namely, rubber floor tiles; non-metallic materials for exclusive use in building or construction, namely, rubber floor tiles; building materials, not of metal, namely, rubber floor tiles; refractory construction materials, not of metal; construc...