คำอธิบาย
| Model | Model |
| SPG6-4 | SPG8-4 |
| SPG8-6 | SPG10-6 |
| SPG10-8 | SPG12-8 |
| SPG12-10 | SPG14-8 |
| SPG14-12 | SPG14-10 |
| SPG16-8 | SPG16-10 |
| SPG16-14 | SPG16-12 |
| Model | Model |
| SPG6-4 | SPG8-4 |
| SPG8-6 | SPG10-6 |
| SPG10-8 | SPG12-8 |
| SPG12-10 | SPG14-8 |
| SPG14-12 | SPG14-10 |
| SPG16-8 | SPG16-10 |
| SPG16-14 | SPG16-12 |