Obliquitas pro typo X et typo Y est 30 et 45 respective.
| Specificatio | Superficies specifica (m²/m³) | Densitas massae (kg/m³) | Ratio inanitatis (%) | Pressio diminuta (mmHg/m²) |
| 125Y | 125 | 320 | 90 | 1.8 |
| 250Y | 250 | 420 | 80 | 2 |
| 350Y | 350 | 470 | 78 | 2.5 |
| 450Y | 450 | 520 | 72 | 4 |
| 550Y | 550 | DCXX | 74 | 5.5 |
| 700Y | DCC | DCCL | 72 | 6 |
| 125X | 125 | trecenti | 90 | 1.8 |
| 250X | 250 | 380 | 80 | 2.5 |
| 350X | 350 | 450 | 78 | 3 |
| 450X | 450 | quingenti | 72 | 4.5 |
| 550X | 550 | DCXX | 74 | 5.5 |
| 700X | DCC | DCCL | 72 | 6 |