Meet your tracking and packaging requirements for solid or liquid sample storage with Thermo Scientific™ Nunc™ Low-Profile 5.0mL Externally-Threaded Universal Tubes. A robust solution for solid or liquid sample storage, tubes feature 2D barcodes, graduations, a white patch for labeling, and a wide-mouth design for easy addition and extraction of sample material. The externally threaded design minimizes contamination risk in manual handling procedures. The tubes and rack are rated for storage down to vapor phase liquid nitrogen temperatures.