Reducing coupling
| ø mm. | COD. |
| 20-16 | MB812/M2016 |
| 25-16 | MB812/M2516 |
| 25-20 | MB812/M2520 |
| 32-25 | MB812/M3225 |
| 40-25 | MB812/M4025 |
| 40-32 | MB812/M4032 |
Reducing coupling
| ø mm. | COD. |
| 20-16 | MB812/M2016 |
| 25-16 | MB812/M2516 |
| 25-20 | MB812/M2520 |
| 32-25 | MB812/M3225 |
| 40-25 | MB812/M4025 |
| 40-32 | MB812/M4032 |