It is used to prevent basalt fibre from rain
| Dv, mm | Dn, mm | Dd, mm | А, mm | В, mm | Weight, kg |
| 350 | 350 | 520 | 100 | 130 | 2,37 |
| 400 | 400 | 560 | 100 | 130 | 2,65 |
| 450 | 450 | 620 | 100 | 130 | 3,14 |
| 500 | 500 | 660 | 100 | 130 | 3,44 |
| 550 | 550 | 720 | 100 | 130 | 3,95 |
| 600 | 600 | 760 | 100 | 130 | 4,29 |
| 650 | 650 | 820 | 100 | 130 | 5,26 |
| 700 | 700 | 860 | 100 | 130 | 5,64 |
| 750 | 750 | 920 | 100 | 130 | 6,26 |
| 800 | 800 | 960 | 100 | 130 | 6,66 |
| 900 | 900 | 1060 | 100 | 130 | 7,74 |
| 1000 | 1000 | 1160 | 100 | 130 | 8,89 |