Features: OOTDTY new and high quality Durability: the antifreeze tester adopts high-quality plastics and rubber materials to easily test the freezing and boiling temperature of the coolant in aqueous solution; large rubber balls and rubber pipes can easily inhale liquids into small plastic containers. Applications:this density meter is suitable for testing hot or cold batteries on 6-volt and 12-volt systems. Easy to use, simple to operate, light and convenient to carry is a practical tool for accurately detecting antifreeze. Efficacy: suitable for winter and summer use, which helps to avoid freezing or overheating. Quickly test the coolant tester to quickly understand the coolant The transparent contains sensitive pointers, which can measure the solidification point and boiling point of the liquid at the temperatures of and Specifications: Material: ABS Size: 17cm/ 6.69 in Package Includes: 1x Hydrometer Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. _x000D_