Section 13 Articles of stone, plaster,cement,asbestos, mica or similar materials; ceramic products; glass and glassware 70 Glass and glassware 70 04 Drawn/blown glass, in sheets, not otherwise worked 70 04 90 Optical glass, not optically worked 70 04 90 10 Optical glass, not optically worked Commodity Code Description 70 04 90 10 00 Optical glass, not optically worked