Section 13 ARTICLES OF STONE, PLASTER, CEMENT, ASBESTOS, MICA OR SIMILAR MATERIAL S; CERAMIC PRODUCTS; GLASS AND GLASSWARE 70 Glass and glassware 70 11 Glass envelopes (including bulbs and tubes), open, and glass parts thereof, with 70 11 20 70 11 20 00 Commodity Code Description 70 11 20 00 00 - For cathode-ray tubes