Stone, granite, marble; artificial stone; building stone; non-metallic tile planks of ceramic clay, glass, [ gypsum ] or earthenware; non-metallic tiles of ceramic, clay, glass, [ gypsum ] or earthenware; ceramic or glass mosaics for building; non-metal roof coverings; non-metal wall linings for building; non-metallic building tiles of ceramic, clay, glass, [ gypsum ] or earthenware; non-metal wall and floor tiles for building; [ floor tiles and wood board; parquet flooring and parquet slabs of wood; ] non-metallic floor slabs of ceramic [ and wood ]; non-metallic floor blocks of ceramic and concrete; [ fitted non-metal panels for swimming pool area covering; ] non-metal floor and wall panels; non-metal swimming pools; [ non-metal building materials, namely, angle irons not of metal; manhole covers, not of metal; ] gutter pipes, not of metal; [ water-pipes, not of metal; water-pipe valves, not of metal or plastic; penstock pipes, not of metal; ] gratings, not of metal; diving boards, not of metal