2312 Shaping and processing of flat glass

23.12.1 Shaped and processed flat 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; 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