This is the M3 carbide stylus XXT #A-5004-3179. It has a titanium base, tungsten carbide stem, and a ruby ball.
| Styli | M3 |
| Ball Diameter (DK) | 0.6 mm |
| Length (L) | 20.0 mm |
| Base Diameter (DG) | 5.0 mm |
| EWL (ML/ML1) | 1.0 mm/4.6 mm |
| Stem Diameter (DS/DS1) | 1.0 mm/0.4 mm |
| Stem material | Tungsten Carbide |
| Mass | 0.68 g |
