The description of the item 6909190060 of France HScode: Ceramic wares for chemical or other technical uses (excl. of porcelain or china, articles having a hardness equivalent to >= 9 on the Mohs scale, millstones, polishing stones, grindstones and the like of heading 6804, refractory ceramic goods, electrical devices, insulators and other electrical insulating fittings) : 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