Dynarex LabChoice Centrifuge Tubes are designed to reliably hold liquids during centrifugation procedures. These Centrifuge Tubes are crafted from high-quality polypropylene for increased durability and improved corrosion resistance. The Tubes are made with a flat top, screw cap to help ensure a secure seal and reduce the risk of leakage. Transparent plastic materials provide enhanced clarity for easy monitoring of contents. Dynarex LabChoice Centrifuge Tubes feature a white writing panel for easy labeling and clear graduated marks for accurate measurement. These Centrifuge Tubes are autoclavable and freezable. 25 PER BAG, 20 BAGS PER CASE