Ideal for molecular biology applications like PCR. Feature and inert, hydrophobic barrier that prevents pipettor contamination. Aerosol barrier will not trap liquid or contaminate samples in the event of over-pipetting. Universal Fit for research-grade pipettors. Natural Polypropylene Low Binding Sterile Racked Tips Cell Rack Volume Range: 1-20 ul Grad Lines: No Graduations Certified RNase/DNase Free Certified Human DNA Free Certified PCR Inhibitor Free Certified Pyrogen Free 96 Tips/Rack, 10 Racks/Pack, 5 Packs/Case