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 the reof, without fittings, for electric lamps and light sources, cathode-ray tubes or the like. 70 11 20 For cathode-ray tubes Commodity Code Description 70 11 20 00 For cathode-ray tubes
