In acciaio legato. Steel alloy.
| ø | D | H | CODE |
| mm | mm | mm | |
| 30 | 35 | 5 | 99403035005 |
| 30 | 35 | 10 | 99403035010 |
| 30 | 35 | 20 | 99403035020 |
| 30 | 35 | 150 | 99403035150 |
| 30 | 40 | 5 | 99403040005 |
| 30 | 40 | 10 | 99403040010 |
| 30 | 40 | 20 | 99403040020 |
| 30 | 40 | 150 | 99403040150 |
| 35 | 40 | 5 | 99403540005 |
| 35 | 40 | 10 | 99403540010 |
| 35 | 40 | 20 | 99403540020 |
| 35 | 40 | 150 | 99403540150 |
