This M5 ruby ball styli has a zirconia ball material. It is stylus #A-5003-5747. 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.
| Thread mount (DG) | M5 |
| Ball Diameter (DK) | 4.0 mm |
| Length (L) | 20.0 mm |
| Stem Diameter (DS) | 2.0 mm |
| EWL (ML) | 11.9 mm |
| Tip material | Zirconia |
| Stem material | Tungsten Carbide |
| Mass | 5.19 g |
