In chrome-plated brass with a ring, waterproof, closure by "wing nuts".
| Reference | Passage | Ø embedding | Ø overall | Useful length mm |
|---|
| 19.697.03 | 100 | 125 | 150 | 12 |
| 19.697.04 | 125 | 152 | 180 | 12 |
| 19.697.05 | 150 | 177 | 200 | 12 |
Features: Round porthole in chrome-plated brass