Building and construction materials and elements, not of metal; prefabricated building components (non-metallic -); prefabricated building elements (non-metallic -) for on site assembly; non-metallic building facade elements for building and construction; cement mixes; drywall panels [building materials] of non-metallic materials; internal partitioning made of non-metallic materials for building; cement slabs; gypsum wallboards; plaques made of concrete; planks of non-metallic materials for u...