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 wool, rock wool...; exfollated vermiculite, expanded clays... 68 06 90 Other Commodity Code Description 68 06 90 00 Other