It serves as a support
It is installed on the bracket
| Dv, mm | Dn, mm | А, mm | В, mm | С, mm |
| 100 | 160 | 270 | 220 | 20 |
| 110 | 180 | 290 | 240 | 20 |
| 115 | 180 | 290 | 240 | 20 |
| 120 | 180 | 290 | 240 | 20 |
| 125 | 200 | 310 | 260 | 20 |
| 130 | 200 | 310 | 260 | 20 |
| 135 | 200 | 310 | 260 | 20 |
| 140 | 200 | 310 | 260 | 20 |
| 150 | 220 | 330 | 280 | 20 |
| 160 | 220 | 330 | 280 | 20 |
| 180 | 250 | 360 | 310 | 20 |
| 200 | 260 | 370 | 320 | 20 |
| 220 | 280 | 390 | 340 | 20 |
| 230 | 300 | 410 | 360 | 20 |
| 250 | 320 | 430 | 380 | 20 |
| 300 | 360 | 470 | 420 | 30 |