Class 23.99
| SNI code | Activity |
|---|---|
| C | Manufacturing |
| 23 | Manufacture of other non-metallic mineral products |
| 23.9 | Manufacture of abrasive products and non-metallic mineral products n.e.c. |
| 23.99 | Manufacture of other non-metallic mineral products n.e.c. |
| 23.991 | Manufacture of stone and mineral wool products |
| 23.999 | Manufacture of various other non-metallic mineral products n.e.c. |