Feature: 1. Professional for measuring acidity and alkaline storage battery solution, provides you a more exact data. 2. The high-quality glass rubber material is more conducive to observing the value and brings more convenience to your inspection. 3. Small and light in weight, and convenient for you to carry, it can reduce your burden. 4. When using, you just need to put the meter vertical immerse in a container, then you can read electric liquid density from the table at any time. 5. Its main function is for measuring electric battery fluid density, you can use it in any car. Specification: Material: Glass + Rubber Color: As the Picture Shown Measure Range: 1.10-1.30 Whole Length: Approx. 275mm/10.8in Package List: 1 x Battery Hydrometer Note: It is not easy to master the concentration ratio of water in battery, so the densitometer is very important. Usually the density of the electrolyte should be controlled at 1.27.