This is the M2 ruby stylus #A-5003-0065. It features a ceramic stem.
For ball diameters greater than 3 mm, and lengths over 30 mm, ceramic stems offer stiffness comparable to steel but are significantly lighter than tungsten carbide. Ceramic stemmed styli can also offer additional crash protection to your probe as the stem will shatter in a collision.
| Thread mount (DG) | M2 |
| Ball Diameter (DK) | 4.0 mm |
| Length (L) | 50.0 mm |
| Stem Diameter (DS) | 2.0 mm |
| EWL (ML) | 50.0 mm |
| Ball material | Ruby |
| Stem material | Ceramic |
| Mass | 0.91g |
