Classification Information
Gutter pipes, not of metal; Non-metal ceiling panels; Non-metal windows; Nonmetal pet doors; Roof coverings, not of metal; Roofing tiles, not of metal; Roofing, not of metal, incorporating photovoltaic cells; Slabs, not of metal, for building; Water-pipes, not of metal; Waterproof membrane for use as a floor underlayment; Waterproofing membranes for roofing, floors and walls
Nonmetallic Building Materials