Sokhansha Master Ring Gauge

Caution
Product Description
[Features]
· The master ring is a gauge used as a measuring instrument standard.
· For use as a reference for precision measuring instruments, the tolerances of circularity, cylindricity, and diameter for the gauge part are regulated by JMAS (standards of Japan Precision Measuring Instruments Manufacturers Association).
· Nominal dimensions and measured values are engraved on the master ring gauge