This is the M2 star stylus center #A-5000-3609.
These provide maximum probing flexibility with a single probe. Taking up to five styli of the same mounting thread, this accessory allows you to build stylus configurations to your own specification.
| Thread mount (DG) | M2 |
| Overall length (L) | 16.3 mm |
| EWL (ML) | 12.0 mm |
| Stem diameter (DS) | 1.4 mm |
| Ball diameter (DK) | 2.0 mm |
| Ball material | Ruby |
| Stem material | Stainless Steel |
| Mass | 0.44 g |
