High-purity polypropylene is oleamide- and diHEMDA-free Independently certified sterile and free of biological contaminants Non-self sealing filters allow sample recovery if filter is wetted Thin-walled With PE filter to protect both sample and pipette Available in either standard or ultra low retention types Available in convenient rack format, racked tips are colorless and placed into blue-colored tip tray Ultra low retention tips Produced through special, patented physicochemical process Homogeneous, defect-free surface for low surface tension and low sample retention Reduce sample loss and provide substantially higher reproducibility when working with critical media For biological samples that contain proteins, nucleic acids, detergents and other difficult liquids that can increase sample loss High chemical resistance Tips can be autoclaved at 121°C (2 bar) without damaging low retention or filter properties