Section 13 Articles of stone, plaster,cement,asbestos, mica or similar materials; ceramic products; glass and glassware 68 Articles of stone, plaster, cement, asbestos, mica or similar materials 68 06 Slag & similar mineral wools;expanded minerals;sound/heat insulating/absorbing materials 68 06 20 Exfoliated vermiculite,expanded clays,foamed slag and similar expanded minerals (...) Commodity Code Description 68 06 20 00 Exfoliated vermiculite,expanded clays,foamed slag and similar expanded minerals (...)