Johari Dial Gauge 20mm (Eco.) is a pocket-size millimeter guage made to measure the size of the small gemstones or diamonds of size up to 20mm.
- Its accuracy is as per industry standard upto 0.1mm
- Due to its built quality is great, it can maintain accuracy for a long time
- Well built to last long
- Comes with a compact carry case
- 1 Revolution equals to 10mm
