Section 05 MINERAL PRODUCTS 25 Salt; sulphur; earths and stone; plastering materials, lime and cement 25 17 Pebbles, gravel, broken or crushed stone, of a kind commonly used for concrete a 25 17 20 25 17 20 00 Commodity Code Description 25 17 20 00 00 - Macadam of slag, dross or similar industrial waste, whether or not incorporating the m