Feature: 1. Large Floating Discs: Each colored disc in the Anti‑Coolant Tester is designed to float at a different specific gravity, floating more as specific gravity increases 2. Fast Detection: Our professional hydrometer quickly and easily draws liquid with the one‑piece rubber bulb and neoprene tip, offering results in seconds. 3. High Quality Materials: Anti freeze tester is made of high quality rubber and ABS material, wear resistant and durable. 4. Clear Glass Pipe: Clear glass pipe allows you to inspect the condition of the antifreeze, easily inspect color, any rust, sludge, or other sediments. 5. High Accuracy: Easy to read with scale and pointer. Calibrated in ℃ and ℉, measures freezing point for winter protecting and boiling point for summer protecting. 6. Function: Automotive antifreeze tester is designed to easily test freezing and boiling temperatures of your coolant to water solutions, fast and accurate. Specification: Item Type: Coolant Density Specific Gravity TesterMaterial: ABS+Rubber+Neoprene+Glass Fitment: Universal for car . Package List: 1 x Coolant Density Specific Gravity Tester Note: When reading, observe the line of sight should be parallel to the liquid level.