| Modelo | Escalera | Útil |
|---|---|---|
| WHSP4 | 1.20 | 2.20 |
| WHSP5 | 1.50 | 2.50 |
| WHSP6 | 1.80 | 2.80 |
| WHSP7 | 2.10 | 3.10 |
| WHSP8 | 2.40 | 3.40 |
| WHSP9 | 2.70 | 3.70 |
| WHSP10 | 3.00 | 4.00 |
| WHSP11 | 3.30 | 4.30 |
| WHSP12 | 3.60 | 4.60 |
| WHSP13 | 3.90 | 4.90 |
| WHSP14 | 4.20 | 5.20 |
| WHSP16 | 4.80 | 5.80 |
| WHSP18 | 5.40 | 6.40 |
| WHSP20 | 6.00 | 7.00 |
| WHSP22 | 6.60 | 7.60 |
