ZAPTM Aerosol Filter Pipet Tip With FlexTopTM and Graduations provided by STEMart fits most popular 100 µL pipettors. The pipet tip features patented robotically inserted endotoxin free filter and refillable autoclavable rack. The pipet tip is made of polypropylene USP Class VI resin and free of protease, human DNA, ATP, RNase/DNase and endotoxin. Validated Sterilization (ISO 11137) for use in Research and Medical labs.