HTS Number	Description	Unit of Quantity	General Rate of Duty	Details
6903	Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths and rods), other than those of siliceous fossil meals or of similar siliceous earths:
6903 1000.00	Containing by weight more than 50 percent of graphite or other carbon or of a mixture of these products	kg	Free	More
6903 2000.00	Containing by weight more than 50 percent of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)	kg	Free	More
6903 9000	Other		Free
6903 9000.10	Of clay	kg	Free	More
6903 9000.50	Other	kg	Free	More