19 Building materials, not of metal; Rigid pipes, not of metal, for building; Pitch, tar, bitumen and asphalt; Non-metallic transportable structures; Monuments, not of metal; Buildings, not of metal; Acoustic panels, not of metal; Scaffolding, non-metallic; Building glass; Insulating glass for building; Concrete; Cement; Works of art of stone, concrete or marble; Statues of stone, concrete or marble; Figurines of stone, concrete or marble; Stained-glass windows; Wood for building; Manufactured timber