They protect the ends of blow-off pipes against the influence of weather conditions.
| Twisted | Twisted | Twisted | Twisted | Twisted | Twisted | |
| Diameter | DN10 | DN15 | DN20 | DN25 | DN32 | DN40 |
| Internal thread size | G 3/8 | G 1/2 | G 3/4 | G1 | G1 1/4 | G1 1/2 |
| Material | Galvanized steel | Galvanized steel | Galvanized steel | Galvanized steel | Galvanized steel | Galvanized steel |
| Product number | 09-01-01 | 09-01-02 | 09-01-03 | 09-01-04 | 09-01-05 | 09-01-06 |