Harmonized System
Section XIII > Chapter 69 > Heading 6901 > 6901.00
Bricks, blocks, tiles and other ceramic goods of siliceous fossil meals (for example, kieselguhr, tripolite or diatomite) or of similar siliceous earths
Section XIII > Chapter 69 > Heading 6902
Refractory bricks, blocks, tiles and similar refractory ceramic constructional goods, other than those of siliceous fossil meals or similar siliceous earths.
Section XIII > Chapter 69 > Heading 6902 > 6902.10
Containing by weight, singly or together, more than 50 % of the elements Mg, Ca or Cr, expressed as MgO, CaO or Cr2O3
Section XIII > Chapter 69 > Heading 6902 > 6902.20
Containing by weight more than 50 % of alumina (Al2O3), of silica (SiO2) or of a mixture or compound of these products
Section XIII > Chapter 69 > Heading 6903
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.
Section XIII > Chapter 69 > Heading 6903 > 6903.10
Containing by weight more than 50 % of free carbon
Section XIII > Chapter 69 > Heading 6903 > 6903.20
Containing by weight more than 50 % of alumina (Al2O3) or of a mixture or compound of alumina and of silica (SiO2)
Section XIII > Chapter 69 > Heading 6904
Ceramic building bricks, flooring blocks, support or filler tiles and the like.