This is the M5 stylus for Zeiss #A-5555-0055. It is a small ball styli with a stepped stem and a stainless steel base. It has a tungsten carbide stem and a ruby ball.
| Styli | M5 |
| Stylus Base Width (DG) | 11.0 mm |
| Ball Diameter (DK) | 1.35 mm |
| Overall length (L) | 44.0 mm |
| Stem diameter (DS) | 1.0 mm |
| EWL (ML) | 19.0 mm |
| Stem material | Tungsten Carbide |
| Mass | 7.5 g |
