6909190060
- Ceramic wares for laboratory, chemical or other technical uses; ceramic troughs, tubs and similar receptacles of a kind used in agriculture; ceramic pots, jars and similar articles of a kind used for the conveyance or packing of goods
- Ceramic wares for laboratory, chemical or other technical uses
- Other
- Supports for catalysts, consisting of porous ceramic pieces, of a blend of silicon carbide and silicon, with a hardness of less than 9 on the Mohs scale, with a total volume of not more than 65 litres, having, per cm$2 of the surface of the cross section one or more closed channels at the tail end