Sand, gravel, crushed stone, asphalt, bitumen, cement, gypsum, plaster, concrete, marble blocks for construction, included in this class, 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, included in this class; non-metallic buildings, non-metallic building materials, poles not of metal for power lines, barriers not of metal; natural and synthetic coatings in the form of panels and sheets, being building materials; bitumen cardboard coatings for roofing; bitumen coaling for roofing; traffic signs not of metal, non-luminous and non-mechanical, for roads, monuments and statuettes of stone, concrete and marble, building glass, prefabricated swimming pools not of metal (structures), aquarium sand