Hand-Held Refractometer For Gem Tester(1.35-1.85)

Specification:

1. Measuring Range: 1.35 -1.85 RI;

2. Accuracy: ±0.003;

3. Two ways power supplies: 2x AAA batteries and 3V DC with world wide 100-240v;

4. Appearance: white aluminum alloy;

5. Package: one set in a color box;

6. With big eyepiece for easy read out the RI 

7. With hardness CZ testing table

8. With monochromatic LED light

Accessories:

1. 2x AAA batteries;

2. 2ml refringent oil;

3. power adapter.