Description The item is a floating hydrometer. This product is made of glass material for long-lasting and practical use, which can come into direct contact with water without imparting any odor. It offers precise measurements. This hydrometer can be widely used in fish tanks and aquariums. Feature - Color: As shown - Material: Glass - Size: Approximately 20x1.3x1.3cm - Test Range: 0-40 1.000-1.060 - Made from high-quality glass material, it can be in direct contact with water. - Can be placed in any corner of the fish tank; the floating design allows for automatic temperature/salinity testing. - Convenient for testing the specific gravity and temperature of water. - In an aquarium, it facilitates measuring the specific gravity of seawater, making it easier to care for fish. - Easy to use and suitable for fish tanks and aquariums. Packing list: 2 x Hydrometer