Dynarex LabChoice Plastic Test Tubes are constructed to reliably contain, store, or mix chemicals, microorganisms, fluids, and other substances for use in laboratory environments. These Test Tubes are molded from either polystyrene or polypropylene for optimal durability and improved corrosion resistance. The Tubes are made from transparent materials to provide optimal clarity and visibility of contents. Dynarex Lab Choice Plastic Test Tubes are autoclavable.  1000 PER BAG, 2 BAGS PER CASE