Іt is used to connect horizontal and vertical chimney
Dn, Dv- any diameter of standard sizes larger than the diameter of the insert
| Div, mm | Din, mm | L, mm | H, mm | Dv, mm | Dn, mm |
| 350 | 420 | 90 | 600 | 350 | 420 |
| 400 | 460 | 120 | 700 | 400 | 460 |
| 450 | 520 | 90 | 700 | 450 | 520 |
| 500 | 560 | 120 | 800 | 500 | 560 |
| 550 | 620 | 120 | 860 | 550 | 620 |
| 600 | 660 | 120 | 900 | 600 | 660 |
| 650 | 720 | 140 | 1000 | 650 | 720 |
| 700 | 760 | 120 | 1000 | 700 | 760 |
| 750 | 820 | 140 | 1100 | 750 | 820 |
| 800 | 860 | 120 | 1100 | 800 | 860 |
| 900 | 960 | 170 | 1300 | 900 | 960 |
| 1000 | 1060 | 120 | 1300 | 1000 | 1060 |