Featuring a rack with an 8 x 12 hole-pattern on traditional 9mm centers, the entire System conforms to the SBS footprint/configuration compatible with robotic workstations, multichannel pipettors and auto-sampling instruments. An alpha-numeric, non-reversing rack and lid ensure positive sample identification. The lid, with individual condensation rings above each tube, prevents cross-contamination. The inert polypropylene tubes, rack and lid can be autoclaved, centrifuged at moderate speeds and stacked for long-term, low temperature storage of biological samples. Available non-sterile or sterile, in three sizes of autoclavable polypropylene single tubes, and in 8- or 12-TubeStrips.