Description: The test tube is suitable for all kinds of frozen experiment. It can stand and you can use one hand to unscrew the cap, easy and convenient operation. Features: Smooth wall and good transparency. Good sealing cap, samples will not volatilize. With 1-5ml calibration, easy reading of the liquid volume. Resistance to low temperature, can be frozen for a long time. Used in hospitals, prevention station, schools, scientific research laboratory, etc. Specifications:Height: 58mm / 2.28"Diameter: 15mm / 0.59"Volume: 5mlQuantity: 10pcs per bagWeight: 36g(approx.) Package Includes: 1 Bag(10pcs) x Test Tubes Note:1. Please allow 1-3mm error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.