APT™ 50 µL Pipet Tip with ZAP™ Aerosol Filter. Fits 90 µL Beckman® P50XL AP96 Pipettors. Sterile. ATP, RNase/DNase and Endotoxin Free (non-pyrogenic). Polypropylene USP Class VI resin. Validated Sterilization (ISO 11137) for use in Research and Medical labs. Magenta color. 960 tips pack. 51.3 mm H. Made in USA.