These state-of-the-art polypropylene pipette tips feature a unique, hydrophobic super filter. The inert filter prevents liquid bypass in the event of over-pipetting and doesn't seal or trap liquid—allowing for non-contaminated sample recovery. Filters also eliminate trace carryover and contamination by aerosols generated during sample aspiration. Autoclavable tips are available either non-sterile or gamma-irradiation sterilized, and packaged in racks of 96 or 100. Each rack is stackable, shrink wrapped with a tear-off seal, and labeled with pipette type and lot number.