- The 50 mm NIST Certified '0' center radiopaque ruler is used for calibrating centers and quality control for scanograms, radiographic x-ray & fluoroscopy equipment.
- High definition, lead-free radiopaque extremity ruler used for direct measurements on a radiograph or x-ray.
- Color: Clear Acrylic
- Demarcations: 1 mm increments
- Ruler sold individually
- NIST certified traceable certificate included.
- Made in the U.S.A. by former members of the U.S. Armed Forces