Branching overlaying round/rectangulare duct
CB
CBF
| Size | ΦD(mm) | Φd(mm) | L(mm) |
| 100-100 | 99 | 99 | 288 |
| 125-100 | 124 | 99 | 288 |
| 150-100 | 148.9 | 99 | 288 |
| 160-100 | 158.9 | 99 | 288 |
| 200-100 | 198.9 | 99 | 288 |
