Building materials, not of metal, for swimming pools namely concrete, building timber, wood paneling, bricks, cement, paving slabs not of metal, gypsum, marble, parquet flooring, stone, plaster, sand except foundry sand, building glass; concrete building materials namely blocks, bricks, panels, slabs; swimming pools parts not of metal namely curbs not of metal; waterproof tiles not of metal
Nonmetallic Building Materials