| Model | Material of Construction | Length (mm) | Electrical resistance |
|---|---|---|---|
| 951-200 | Aluminium | 200 | No |
| 951-300 | Aluminium | 300 | No |
| 951-450 | Aluminium | 450 | No |
| 951-600 | Aluminium | 600 | No |
| 951-900 | Aluminium | 900 | No |
| 951-1200 | Aluminium | 1200 | No |
| 951-1500 | Aluminium | 1500 | No |
| 951-2000 | Aluminium | 2000 | No |
| 951-2500 | Aluminium | 2500 | No |
| 951-2750 | Aluminium | 2750 | No |
| 951-3000 | Aluminium | 3000 | No |
