Use for serial dilutions, mixing, or storing samples. Each polypropylene tube holds up to 1.2 mL (1.0 mL with caps). Bold, printed alpha-numeric markings on the rack are easy to read. The 8 x 12 format rack accommodates multi-channel pipettors, includes a lid for safe storage, and is compatible with robotic systems. Certified RNase, DNase, DNA, and PCR inhibitor free. Sterile tubes are also certified pyrogen free.