Building materials as finished products made of concrete, gypsum, clay, potters' clay, stone, marble, wood, plastics and synthetic materials for building, construction, road construction purposes, namely, concrete panels, concrete walls, blocks of concrete, construction material, namely, fiberglass panels, construction material, namely, fiberglass faced panels, construction material, namely, nonmetal exterior panels, wall panels not of metal, facade elements of non-metallic materials, non-met...