Сompensates for axial thermal extension of chimney and is used as a pipe of non-standard length
| Dv, mm | Dn, mm | L = 0,5 - 1 m | L = 0,3 - 0,5 m |
| Weight, kg | |||
| 350 | 420 | 18,5 | 9 |
| 400 | 460 | 19,5 | 9,5 |
| 450 | 520 | 23,4 | 11,4 |
| 500 | 560 | 24 | 11,7 |
| 550 | 620 | 28,2 | 13,7 |
| 600 | 660 | 28,5 | 14 |
| 650 | 720 | 36,3 | 17,8 |
| 700 | 760 | 36,6 | 17,9 |