19 Wood paving, namely, blocks and tiles not of metal; wooden veneers; artificial stone veneers; wood veneers; parquet floor boards; wooden floor boards; fiberboards; wooden flooring; concrete; cement; cement slabs; bricks; tiles, not of metal, for building; floor tiles, not of metal; tile floorings, not of metal; pantiles, not of metal; wall tiles, not of metal; ceramic tiles; refractory construction materials, not of metal; parquet flooring; flashing, not of metal, for building; wall linings, not of metal, for building; gates, not of metal; door panels, not of metal; non-metal building materials, namely, manufactured brick, cement, fiber cement, marble, stone veneers for use on floors, walls, interior and exterior surfaces; non-metal building materials, namely, pre-cast concrete wall forms; concrete building materials, namely, blocks, bricks, posts, slabs, panels; paving slabs, not of metal; slabs, not of metal, for building