This is the M5 stylus for Zeiss probing systems #A-5555-0021. It is a tungsten carbide styli with a titanium base, tungsten carbide stem, and ruby ball material.
| Styli | M5 |
| Stylus Base Width (DG) | 11.0 mm |
| Ball Diameter (DK) | 3.0 mm |
| Overall length (L) | 58.0 mm |
| Stem diameter (DS) | 2.00 mm |
| EWL (ML) | 48.0 mm |
| Stem material | Tungsten Carbide |
| Mass | 5.5 g |
