Used to store, transport or freeze samples, 5ml (16 x 60mm) and 10ml (16 x 80mm) tubes are fitted with leak-proof screw-caps. High-grade polypropylene with vivid white printed graduations and marking area. Tubes are self-standing and come packaged in 10 bags of 100 tubes. Leak-proof, 1.25 turn screw-cap (attached). Meet 95kPa transportation guidelines. Sterile, RNase, DNase, pyrogen free.