Subheadings 4
6909.11 Ceramic wares; for laboratory, chemical or other technical uses, of porcelain or china 6909.12 Ceramic wares; for laboratory, chemical or other technical uses, articles having a hardness equivalent to 9 or more on the Mohs scale 6909.19 Ceramic wares; for laboratory, chemical or other technical uses, other than articles having a hardness equivalent to 9 or more on the Mohs scale or of porcelain or china 6909.90 Ceramic wares; pots, jars and similar articles of a kind used for the conveyance or packing of goods and ceramic troughs, tubs and similar receptacles used in agriculture