High transparency - it is easy to observe the condition in the test tube. With 1-5ml calibration, easy to read the liquid volume. Orange compact screw sealing cap - perfectly matched, and the sample will not volatilize. Low temperature resistance - can be cryogenic (-180 ℃) Used in hospitals, epidemic prevention stations, schools, scientific research laboratories, etc. Specification: 5ml (erect) Packing: 400 pieces Outer diameter: 16mm Height: 59mm Color: blue Material: plastic Package Contents: 2 set x plastic tubes with caps Only the above package content, other products are not included. Other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.