Use for serial dilutions, mixing, or storing samples. Open bottom racks aid temperature equilibration in water or ice baths. 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 pipettes, includes a lid for safe storage, and is compatible with robotic systems. Certified RNase, DNase, DNA, and PCR inhibitor free. Tested pyrogen free.