19 Pantiles, not of metal; roofing, not of metal; roofing tiles, not of metal; roofing, not of metal, incorporating solar cells; building materials, not of metal, namely, fascia, fiberglass panels, floor boards, soffits; potters' clay; refractory construction materials, not of metal; flashing, not of metal, for building; tiles, not of metal, for building; refractory fiber, namely, non-woven textiles made of synthetic fibers for use in the building industry, fired refractory materials, not of metal