This is M2 ruby ball styli #A-5004-2919**. It has a Zirconia ball material and features tungsten carbide stems. Zirconia is a particularly tough ceramic material with hardness and wear characteristics approaching those of ruby. Its surface properties make it an ideal material for aggressive scanning applications on cast iron components.
**-special
| Thread mount (DG) | M2 |
| Ball Diameter (DK) | 1.0 mm |
| Length (L) | 10 mm |
| Stem Diameter (DS) | 0.7 mm |
| EWL (ML) | 4.0 mm |
| Ball material | Zirconia |
| Stem material | Tungsten Carbide |
| Mass | 0.3g |
