This is the M5 long threaded stylus #A-5555-1873. It has a long threaded styli that is 5.0 mm. It has a stainless steel base, tungsten carbide stem, and ruby ball.
| Thread mount | M5 |
| Ball diameter (DK) | 1.5 mm |
| Overall length (L) | 33.0 mm |
| EWL (ML/ML1) | 24.0 mm/ 7.0 mm |
| Stem diameter (DS/DS1) | 1.5 mm/ 1.0 mm |
| Base diameter (DG) | 11.0 mm |
| Ball Material | Ruby |
| Stem Material | Tungsten Carbide |
| Mass | 7.0 g |
