- Coefficients of linear expansion: 1.2×10⁻6（1/10 of iron）
- It doesn't rust.
- Special welding method → Low-temperature welding makes a stylus ball difficult
to break and it won't vary across the ages because of no internal stress.
- It has superior quality to others on the market at the same price.
- No measurement error by magnetic power.
- No need for deGause or replacement of a stylus.
- This improves your working efficiency.
- Magnetic permeability（μ）≦1.01 ... nonmagnetic!
- Sphericity ≦0.6μm
- Hardness: HRA92
- Electrical Resistivity: 3.2μΩ（1/3 of iron）