The MTC Bio C1811 5mL Transport/Mailing Tubes with Attached Screw-Cap, Sterile, 16 x 60mm, 100 per Bag, Pack of 1000, are used in multiple sectors of the laboratory market, including medical, hospital, environmental, independent testing, food testing, and biological research labs. The tubes are designed to store, transport or freeze samples. The 5mL (16 x 60mm) tubes are fitted with leak-proof screw-caps. They are made of high-grade polypropylene, and include white printed graduations and marking area. The tubes are self-standing and come packaged in 10 bags 100 tubes.