… Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and …
Explanatory notes
… 69.03 - Other refractory ceramic goods (for example, retorts, crucibles, muffles, nozzles, plugs, supports, cupels, tubes, pipes, sheaths, rods and … however, include Seger cones (ceramic firing testers) (see Explanatory Note to heading 38.24 ); these are not fired …