Section 13 Articles of stone, plaster,cement,asbestos, mica or similar materials; ceramic products; glass and glassware 69 Ceramic products 69 03 Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, pl 69 03 10 Containing by weight more than 50 % of free carbon Commodity Code Description 69 03 10 00 Containing by weight more than 50 % of free carbon
