Introducing the Nalge Nunc CryoTube Vials, designed for optimal sample storage and preservation. Made from durable polypropylene, these sterile vials feature an external thread with a secure screw cap, ensuring leak-proof storage. The conical-bottom design allows for easy sample retrieval, making them perfect for cryogenic applications. Each pack contains high-quality vials that are ideal for biological samples, cell cultures, and more. Trust NUNC 347597 for reliable performance in your laboratory needs. Keep your samples safe and secure with these essential cryogenic vials!