Section 13 ARTICLES OF STONE, PLASTER,CEMENT,ASBESTOS, MICA OR SIMILAR MATERIALS; CERAMIC PRODUCTS; GLASS AND GLASSWARE 70 GLASS AND GLASSWARE 70 08 MULTIPLE-WALLED INSULATING UNITS OF GLASS. 70 08 00 MULTIPLE-WALLED INSULATING UNITS OF GLASS Commodity Code Description 70 08 00 00 MULTIPLE-WALLED INSULATING UNITS OF GLASS