2314 Manufacture of glass fibres

23.14.1 Glass fibres
23.14.11 Slivers, rovings, yarn and chopped strands, of glass fibre
23.14.12 Voiles, webs, mats, mattresses, boards and other articles of glass fibres, except woven fabrics
This subcategory excludes:
- woven fabrics, see 13.20
23.14.9 Sub-contracted operations as part of manufacturing of glass fibres
23.14.99 Sub-contracted operations as part of manufacturing of glass fibres