It are perfect for the safe storage of small biological samples at low temperatures. These cryotubes are made from high-quality PP (polypropylene), offering strength and chemical resistance. The external thread design ensures a tight seal to prevent leakage, while the stand foot allows for easy and organized storage. Each cryotube comes with a write area, making it simple to label and identify your samples. This product is packed in 2 bags of 50 tubes each, providing an efficient and cost-effective solution for laboratories and research environments.