Features: 1. Specially designed for measuring the refractive index of gemstones and solid materials. 2. Lightweight and compact, easy to carry. 3. This refractometer features high accuracy and easy operation. 4. Identify single and double gems quickly and precisely. 5. Low battery consumption for long service time. 6. Approved by strict quality and safety standards for a long and trouble-free using. Specification: Condition: 100% New Item Type: Refractometer Material: ABS Refractive Index Range: 1.30-1.81 RI Color: As Pictures Shown Size: Approx. 13 * 6 * 3.5cm/5.1 * 2.4 * 1.4inch Weight: Approx. 721g Package List: 1 * Refractometer 1 * Electric Torch (Powered by 1 * AA battery which is NOT included)) 1 * English Manual 1 * 3 ML Reflective Index Fluid Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering .wang-edit-text{ font-family:'Arial' important; } .wang-edit-text table { border-top: 1px solid 000; border-left: 1px solid 000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid 000; border-right: 1px solid 000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1Specially designed for measuring the refractive index of gemstones and solid materials. 2Lightweight and compact, easy to carry. 3This refractometer features high accuracy and easy operation. 4Identify single and double gems quickly and precisely. 5Low battery consumption for long service time.