Thread Gauge Feelers Size 4. Ball diameter 0.725 mm. Orientation locking pin parallel
Technical data
| Ball diameter | 0.725 mm |
| Ball constant | 5.00 mm |
| Number of balls | 2 |
| Orientation locking pin | Parallel |
| Locking pin Ø | 1 mm |
| Ball material | Ruby |
| Ball class | Grade 6 |