★ These centrifuge tubes are made in high purity PP Material. They are designed to have longer length screw caps with sealing rings to prevent leakage. 

★ Plastic centrifuge tubes also include a convenient white writing patch for easy marking and identification. The patches are nice for labeling. 

★ Ideal for liquid collection, sample storage, and freezing, these tubes are perfect for use in laboratories and home, such as storing yeast from beer brewing freezing pre-weighed coffee beans. 

★ These centrifuge tubes are sterilized using standard industry methods, ensuring contamination-free performance. Perfect for high-quality research and reliable sample storage in a variety of laboratory applications.