Good quality: The pipettes tips are made from high-quality transparent polypropylene in a unique manufacturing process. They are manufactured in a Class 100,000 cleanroom environment. High Accuracy & Best Sealing: High accuracy control by the pipette tips and the soft conical design provide high sealing. Wildely Application:Will compatible with the majority of micropipettes on the market, including Thermo micropipettes size 1ml-10ml. Safe and Clean: Non-pyrogenic, DNAse/RNAse free