This is the M5 spherical disk styli #A-5555-0124. It has a stainless steel stem and holder, high-strength silver steel disk material, and an aluminum base.
| Thread mount | M5 |
| Disk Angle (DK) | 15.0 mm |
| Overall length (L) | 40.0 mm |
| Base Width (DG) | 7.0 mm |
| Disk Width (B) | 1.0 mm |
| Mass | 5 g |
