Certified by independent laboratory Nonsterile: RNase, DNase, DNA, and pyrogen free Sterile: RNase, DNase, DNA, Bioburden, PCR Inhibitor, and pyrogen free For use with most 200 and 1000μL single and multichannel pipetters Hinged racks can be stacked rack-on-rack Hinged closure on racks allows top lid to be partially open for steam penetration during autoclaving Order Info Shipped in racks, 960/Pack