This is the M5 stylus for Zeiss #A-5555-0068. It is a small ball styli with a titanium base, tungsten carbide stem, and ruby ball.
| Styli | M5 |
| Stylus Base Width (DG) | 11.0 mm |
| Ball Diameter (DK) | 3.5 mm |
| Overall length (L) | 55.0 mm |
| Stem diameter (DS) | 2.5 mm |
| EWL (ML) | 10.0 mm |
| Stem material | Tungsten Carbide |
| Mass | 11.9 g |
