Certified/Calibrated Flexible Rule 18" 5R Graduation - 501-018CT

NIST Traceable Meets ISO Requirements
Rules are hardened and tempered. Precisely etched for high accuracy. Inspected To: Each rule etched with serial number and certificate of inspection, good for 5 years.
ML-STD-45662A
ISO10012-1
ANSI/NCSL Z640-1
NIST#821/260733-98
5R: 32nds, 64th, 10th, 100th.