| Symbol | Single layer | Double layer with inner silicon profile | Smooth inner profile | Grooved inner profile | Flammable, halogen free | Self-extinguishing | Self-extinguishing, halogen free |
|---|---|---|---|---|---|---|---|
| FG | yes | yes | yes | ||||
| FG-FR | yes | yes | yes | ||||
| FG-HFFR | yes | yes | yes | ||||
| FGG | yes | yes | yes | ||||
| FGG-FR | yes | yes | yes | ||||
| FGG-HFFR | yes | yes | yes | ||||
| FGS | yes | yes | yes | ||||
| FGS-FR | yes | yes | yes | ||||
| FGS-HFFR | yes | yes | yes | ||||
| FGGS | yes | yes | yes | ||||
| FGGS-FR | yes | yes | yes | ||||
| FGGS-HFFR | yes | yes | yes |
