# Commission Implementing Regulation (EU) No 1001/2013 of 4 October 2013 amending Annex I to Council Regulation (EEC) No 2658/87 on the tariff and statistical nomenclature and on the Common Customs Tariff, Division 4: For the purposes of heading 7019, the expression ‘glass wool’ means:

Extent: E+W+S+N.I.

(a) mineral wools with a silica (SiO2) content not less than 60 % by weight;
(b) mineral wools with a silica (SiO2) content less than 60 % but with an alkaline oxide (K2O or Na2O) content exceeding 5 % by weight or a boric oxide (B2O3) content exceeding 2 % by weight.
Mineral wools which do not comply with the above specifications fall in heading 6806.

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Source: https://www.legislation.gov.uk/eur/2013/1001/annex/I/chapter/70/annotations/1/annotation/4 (the official version)
Page: https://openlegislation.uk/eu-regulation-2013-1001/annex-I/chapter-70/annotations/1/annotation/4
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.