Made in U.S.A. Autoclavable polypropylene, non-sterile, 20-300µl, 59mm (2.33".) Fits Gilson P1000, Eppendor Research, Reference and Xplorer styles and many other univeral fit pipettors. Developed specifically for multi-channel use. Graduations at 20, 50, 100 and 200µl.