Subheading 6903.20

Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and slide gates), other than those of siliceous fossil meals or of similar siliceous earths. - Containing by weight more than 50% of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)

1 tariff line items