| Size Dim. (mm) | Min. ID Min. Dia. (mm) |
|---|---|
| NPU 50 | 900 |
| NPU 65 | 1000 |
| NPU 80 | 1100 |
| NPU 100 | 1200 |
| NPU 120 | 1300 |
| NPU 140 | 1400 |
| NPU 160 | 1500 |
| NPU 180 | 1600 |
| NPU 200 | 1700 |
| NPU 220 | 1800 |
| NPU 240 | 1900 |
| NPU 260 | 4000 |
| NPU 280 | 4500 |
| NPU 300 | 5000 |
| NPU 320 | 5200 |
| NPU 350 | 5500 |
| NPU 380 | 6000 |
| NPU 400 | 6500 |
| NPU 500 | 7000 |
| NPU 600 | 7500 |
| NPU 700 | 8000 |
| NPU 800 | 8500 |
| NPU 900 | 9000 |
| NPU 1000 | 10000 |