This is the M2 tungsten carbide stylus for Zeiss #A-5555-0311. It has a stainless steel base, tungsten carbide stem, and ruby ball.
| Thread mount | M2 |
| Ball Diameter (DK) | 2.0 mm |
| Length (L) | 16.0 mm |
| Base Diameter (DG) | 3.0 mm |
| EWL (ML) | 12.0 mm |
| Stem Diameter (DS) | 1.0 mm |
| Stem material | Tungsten Carbide |
| Mass | 1.0 g |
