- Material: low-thermal expansion cast metal.
- Gauge for validation of coordinate-measuring machine called “Quality Master”.
- Minimal effect from temperature changes.
- Simple and stable construction with 12 precision bushings in a simple and ideal pattern.
- Minimal stress concentration and temporal variation.
- Cylindrical form.
- Resistant to temperature change, vibration and impact.
- Bilateral symmetry structure
- Verified easily by inverse method.