They protect the ends of blow-off pipes against the influence of weather conditions.
| Flanged | Flanged | Flanged | Flanged | |
| Diameter | DN50 | DN65 | DN80 | DN100 |
| Internal thread size | G2 | G2 1/2 | G3 | G4 |
| Material | Galvanized steel | Galvanized steel | Galvanized steel | Galvanized steel |
| Product number | 09-02-01 | 09-02-02 | 09-02-03 | 09-02-04 |