Section 13 Articles of stone, plaster,cement,asbestos, mica or similar materials; ceramic products; glass and glassware 70 Glass and glassware 70 11 GLASS ENVELOPES (INCLUDING BULBS AND TUBES), OPEN, AND GLASS PARTS THEREOF, WITHOUT F 70 11 20 For cathode-ray tubes Commodity Code Description 70 11 20 00 For cathode-ray tubes