This is the Walter M1.4 thread styli #A-5003-1699.
| Thread mount (DG) | M1.4 |
| Overall length (L) | 12.75 mm |
| EWL (ML) | 1.0 mm |
| Stem diameter (DS) | 0.48 mm |
| Ball diameter (DK) | 0.6 mm |
| Stem material | Stainless Steel |
| Ball material | Tungsten Carbide |
| Center styli | N |
| Mass | 0.41 g |





