19 Boards of gypsum plaster; acoustic panels, not of metal; facing panels of non-metallic materials; wall panels, not of metal; ceiling panels, not of metal; roofing panels, not of metal; concrete panels; gypsum wallboards; building panels, not of metal; suspended ceilings, not of metal; paper for building; paperboard for building; structural frameworks, not of metal, for buildings; building components, not of metal; cladding, not of metal, for building; reinforcing materials, not of metal, for building; manufactured building elements, not of metal; coatings in the nature of building materials; building panels, not of metal; building materials, not of metal; non-metallic transportable structures