This is the M5 stylus for Zeiss #A-5555-0052. It is a small ball styli with a stepped stem and a stainless steel base. It has a tungsten carbide stem with a ruby ball.
| Styli | M5 |
| Stylus Base Width (DG) | 11.0 mm |
| Ball Diameter (DK) | 0.8 mm |
| Overall length (L) | 32 mm |
| Stem diameter (DS1/DS) | 0.6 mm/1.0 mm |
| EWL (ML1/ML) | 4.8 mm/12 mm |
| Stem material | Tungsten Carbide |
| Mass | 6.8 g |







