| Model | FU-4FZ*1 |
| Size | ø3 mm0.118″ |
| Fibre unit length | 2 m78.74″ free-cut |
| Fibre unit diameter | ø1.3×2 |
| Minimum bend radius | R2 mm0.079″ Tough-Flex |
| Minimum detectable object | Gold wire with a diameter of 0.005 mm0.0002″ *2 |
| Environmental resistance Ambient temperature | -40 to +50 °C -40 to 122 °F |
| Weight | Approx. 8 g |
| Model | FU-4F*1 |
| Size | ø3 mm0.118″ |
| Fibre unit length | 2 m78.74″ free-cut |
| Fibre unit diameter | ø1.3×2 |
| Minimum bend radius | R25 mm0.984″ |
| Minimum detectable object | Gold wire with a diameter of 0.005 mm0.0002″ *2 |
| Environmental resistance Ambient temperature | -40 to +70 °C -40 to 158 °F |
| Weight | Approx. 8 g |