Car Hydrometer Tester Rapid-Tester Acid Quality Analyzer Density Tools Features: Easy to operate. High accuracy, easy to read. Quality material, has long service life. Widely applicable for various vehicles. Great for use by professional techs-, mechanics, or anyone else. Specifications: Package Includes: 1x Hydrometer note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.