It is used to close the vacant opening of chimney system
| Dv, mm | Design | Weight, kg |
| 350 | des.-01 | 0,88 |
| 400 | des.-01 | 1,08 |
| 450 | des.-01 | 1,3 |
| 500 | des.-02 | 1,7 |
| 550 | des.-02 | 1,97 |
| 600 | des.-02 | 2,26 |
| 650 | des.-02 | 2,57 |
| 700 | des.-02 | 2,89 |
| 750 | des.-02 | 3,24 |
| 800 | des.-02 | 3,61 |
| 900 | des.-02 | 4,39 |
| 1000 | des.-02 | 5,26 |