Thermo Scientific ART 300ul Barrier Tip Reload Sterile Description: Self-sealing barrier tips block contamination Prevent contamination even under the most demanding conditions 96 tips/tray MBP's Aerosol Resistant Tip (ART) is a self-sealing filter tip that protects pipettors from crossover contamination by not allowing liquids or aerosols to come into contact with the pipettor.