The glass bottle is suitable compatible with small sample testing . Made of glass, corrosion-resistant and high-temperature resistant . Accurate measurement, suitable compatible with density, specific gravity and other experiments . Tight sealing, avoiding liquid leakage . Easy to use, suitable compatible with daily use in the laboratory. Features - Color: As Shown -Material:Glass - Size: 4.00X2.90X2.90cm/1.57X1.14X1.14in -This is a device that accurately measures the volume of a glass or metal container. -The known volume of the pycnometer can be used to determine the density of the powder, liquid, and particulate. -It is suitable compatible with measuring the liquid density in industrial, laboratory, school, agricultural grain and other units, and analyzing the purity, volatile energy or content of the substance. -Made of glass and has a very low heat expansion coefficient. High temperature resistant. -Becompatible withe use, the temperature thermometer, empty bottle weight and water weight should be strictly calibrated according to the requirements, and the requirements can be used.Package list: 1 x lab bottle