High Transparency - Easy to observe the condition in the test tube. With 1-5ml calibration for easy reading of liquid volume. Orange compact screw sealing cap provides a secure fit to prevent sample evaporation. Resistant to low temperatures, suitable for cryogenic use (-180°C). Ideal for use in hospitals, epidemic prevention stations, schools, and scientific research laboratories. Specification: 5ml (erect) Packing: 200 pieces per bag Outer Diameter: 16mm Height: 59mm Color: Blue Material: Plastic Package Contents: 1 set of plastic tubes with caps Note: Only the items listed above are included. Other products are not included. Note: Due to light reflection and differences in display screens, the color of the item may vary slightly from the actual product. Measurement error allowance is +/- 1-3cm.