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PRO Transition Couplers
| Vinidex Code | Nominal Size (mm) | Material | Stiffness (SN) | Carton Quantity |
| 31550 | 225 | PVC | 8 | 2 |
| 31551 | 300 | PVC | 8 | 1 |
| 31552 | 375 | PVC | 8 | 1 |
| 31553 | 450 | PE | 8 | 1 |
| 31554 | 525 | PE | 8 | 1 |
| 31555 | 600 | PE | 8 | 1 |