… Slag wool, rock wool and similar mineral wools; exfoliated vermiculite, expanded clays, foamed slag and similar expanded mineral materials; mixtures and articles of …
Explanatory notes
… 68.06 - Slag wool, rock wool and similar mineral wools; exfoliated vermiculite, expanded … air blast. This heading also includes a class of “alumino-silicates” known as “ceramic fibres”. They are formed by …