A robust solution for solid or liquid sample storage. Thermo Scientific? Nunc? Low-Profile 5.0mL Externally-Threaded Universal Tubes feature 2D barcodes, graduatio ns, a white patch for labeling, recommended work ing volume of 4.5mL and a wide mouth design for easy addition and extraction of solid sample material li ke tissue. The externally-threaded design minimizes conta mination risk in manual handling procedures. The tubes and rack are rated for storage down to vapor phase liquid nitrogen temperatures. Now available in barcoded rack for more efficient tracking.