【Type】: This is an auto repair tool, battery hydrometer. Professional measurement of acid-alkaline battery solutions, to provide you with more accurate data. Its main function is to measure the battery liquid density, you can use it in any car. 【Material】: This battery hydrometer is made of high-quality glass rubber material. The high-quality glass rubber material is more conducive to the observation value and brings more convenience to your inspection. High-quality materials ensure stable performance and durability. 【Convenient to Carry】: Our battery hydrometer is small in size, light in weight, easy to replace and easy to carry, reducing your burden. Excellent workmanship, stable performance, can be purchased and used with confidence. Full length: about 275 mm / 10.8 inches. 【How to Use】: When using the battery electrolyte hydrometer, you only need to immerse the meter vertically in a transparent container, and you can read the electro-liquid density from the meter at any time, which is very convenient to use. It meets strict quality control standards and is reliable in use. 【After Sales Service】: Welcome to visit our store, we will provide you with the best quality service, we will provide the best after-sales service, if you have any questions, please feel free to contact us.