_x005F_x000D__x005F_x000D_It is generally difficult to grasp the concentration ratio of the electric water in the battery during the preparation process, so a measuring tool should be used. This measuring tool is a density meter. Usually the density of electrolyte preparation is controlled at about 1.27._x005F_x000D__x005F_x000D_ Features _x005F_x000D__x005F_x000D_- Color: Assorted color._x005F_x000D_- Size: 29.00X5.50X5.50cm/11.40X2.16X2.16 inch._x005F_x000D_- Material: Glass._x005F_x000D_- Measuring range: 1.1-1.3._x005F_x000D_- Battery hydrometer is used for determining the specific gravity of battery acid._x005F_x000D_- When in use, the meter should be immersed vertically in a transparent container, and the electro-hydraulic density can be read from the meter at any time._x005F_x000D_- Made of high-quality material for a long time and durable use._x005F_x000D_- It has a simple design, but very practical in use, giving you a good using experience._x005F_x000D_- The hydrometer It is easy to use, bring much convenience to you.Packing list: 2 x hydrometers