2312 Shaping and processing of flat glass

23.12.1 Shaped and processed flat glass, except multiple-walled insulating units of glass
23.12.11 Glass in sheets, bent, edge-worked, engraved, drilled, enamelled or otherwise worked, but not framed or mounted
23.12.12 Safety glass
23.12.13 Glass mirrors, whether or not framed
This subcategory excludes:
- rear-view mirrors, see 29.32.30
23.12.14 Float glass and surface ground or polished glass, in sheets, non-wired and having an absorbent, reflecting or non-reflecting layer, but not otherwise worked
23.12.2 Multiple-walled insulating units of glass
23.12.20 Multiple-walled insulating units of glass
23.12.9 Sub-contracted operations as part of manufacturing of shaped and processed flat glass
23.12.99 Sub-contracted operations as part of manufacturing of shaped and processed flat glass