2021-10-04 Conical-bottom Centrifuge tubes,Polypropylene,5ml These conical-bottom tubes are made of ultra-clear polypropylene. 2. Cap Materails: HDPE.3. Leakproof (-95kPa, 14 psi).4. White printed graduations with large marking strip for labeling.5. DNa/RNa free; Non-pyrogeni