Transport tubes, sometimes called mailing 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, these tubes come in both 5mL (16 x 60mm) and 10mL (16 x 80mm) and are fitted with leak-proof screw-caps. They are made of high-grade polypropylene, and include white printed graduations and marking area. Tubes are self-standing and come packaged in 5 bags 100 tubes.