2731 Manufacture of fibre optic cables

27.31.1 Fibre optic cables
27.31.11 Optical fibre cables made up of individually sheathed fibres
27.31.12 Optical fibres and optical fibre bundles; optical fibre cables (except those made up of individually sheathed fibres)
This subcategory excludes:
- optical fibre cables made up of individually sheathed fibres, see 27.31.11
27.31.9 Sub-contracted operations as part of manufacturing of fibre optic cables
27.31.99 Sub-contracted operations as part of manufacturing of fibre optic cables