Explanatory notes
… moulded articles such as tubes, conduits, etc. All these goods may be coloured in the mass, painted, drilled, milled … etc., of unbreakable lamp “glasses”, and of “glasses” for goggles, etc. But mica is mainly used in the electrical … heading 68.06 ) (see relative Explanatory Note). (d) Mica goggles and eyepieces therefor ( heading 90.04 ). (e) Mica …