This is the star styli #A-5555-3839. It has a tungsten carbide stem, stainless steel base, and a ruby ball.
| Thread mount | M5 |
| Ball diameter (DK) | 1.0 mm |
| Overall length (L) | 40.0 mm |
| EWL (ML) | 30.0 mm |
| Stem diameter (DS/DS1) | 4.0 mm/ 0.8 mm |
| Base diameter (DG) | 11.0 mm |
| Styli diameter (A) | 8.0 mm |
| Ball Material | Ruby |
| Stem Material | Tungsten Carbide |
| Mass | 9.0 g |
