ZAP™ SLIK Low Retention Aerosol Filter Pipet Tip. Fits Most Popular 100 µL Pipettors. Sterile. Patented robotically inserted endotoxin free filter. Ultra low fluid retention. Protease, Human DNA, ATP, RNase/DNase and Endotoxin Free (non-pyrogenic). Polypropylene USP Class VI resin. Validated Sterilization (ISO 11137) for use in Research and Medical labs. Refillable autoclavable racks. 96 tips/rack. 10 racks/pack. 49.7 mm H. Made in USA.