Transport tubes are used in multiple sectors of the laboratory market, including medical, hospital, environmental, independent testing, food testing, and biological research labs. Used to store, transport or freeze samples. USP VI Polypropylene Tubes, HDPE Caps Self-standing: the vial placed on the lab workbench steadily even without a base Electron Beam Sterilization, SAL=10-6: safe, fast, environment-friendly, no chemical residues 100,000-level Clean Workshop Production, DNAse-free, RNAse-free, pyrogen-free, endotoxin-free Operating Temperature Range: Approx.-196°C to 121°C Excellent sealing performance, no leakage of negative pressure 95Kpa, ensuring safe and effective air transportation RNase, DNase, Pyrogen free