Classification Information
Concrete; Building stone; Ceramic tiles; Ceramic tiles for flooring and facing; Ceramic tiles for tile floors and coverings; Fired refractory materials, not of metal; Fireproof tiles; Gypsum tiles; Marble; Natural stone and stone tile; Non-metal wall tiles; Stones; Tiles of clay, glass, gypsum, ceramic or earthenware; Tiles, not of metal, for building
Nonmetallic Building Materials