Section 13 ARTICLES OF STONE, PLASTER,CEMENT,ASBESTOS, MICA OR SIMILAR MATERIALS; CERAMIC PRODUCTS; GLASS AND GLASSWARE 69 CERAMIC PRODUCTS. 69 03 THAN THOSE OF SILICEOUS FOSSIL MEALS OR OF SIMILAR SILICEOUS EARTHS. Commodity Code Description 69 03 10 OTH. REFRACTORY CERAMIC GOODS,CONT.BY WGT>50% OF GRAPHITE/OTH.CARBON/A.... 69 03 20 OTH. REFRACTORY CERAMIC GOODS, CONT.BY WGT>50% OF ALUMINA/A MIXTURE/...... 69 03 90 OTH.REFRACTORY CERAMIC GOODS, OTHER THAN THOSE OF SILICEOUS FOSSIL MEALS..