| Catalogue code | Diameter [mm] |
Small box | Large box |
| BTR20 | 20 x 20 | 1 | 1 |
| BTR25 | 25 x 25 | 1 | 1 |
| BTR32 | 32 x 32 | 1 | 1 |
| BTR40 | 40 x 40 | 1 | 1 |
| BTR50 | 50 x 50 | 1 | 1 |
| BTR63 | 63 x 63 | 1 | 1 |
| BTR75 | 75 x 75 | 1 | 1 |
| BTR90 | 90 x 90 | 1 | 1 |
| BTR110 | 110 x 110 | 1 | 1 |
| BTR125 | 125 x 125 | 1 | 1 |
| BTR160 | 160 x 160 | 1 | 1 |
| BTR180 | 180 x 180 | 1 | 1 |
| BTR200 | 200 x 200 | 1 | 1 |
| BTR225 | 225 x 225 | 1 | 1 |
| BTR315 | 315 x 315 | 1 | 1 |
