Abdos Cryo Vials with external threads are meticulously manufactured using high-purity virgin USP Class VI Medical grade polypropylene (PP), adhering to US FDA 21 CFR standards, and ensuring freedom from natural rubber and heavy metals. Designed for long-term cryogenic storage of biological samples, cells, enzymes, or reagents, Abdos Cryo Vials provide a reliable solution for preserving valuable materials. The leak-proof cap design and robust wall thickness make these vials an ideal choice for transporting samples and specimens securely. Designed for mechanical freezing, the screw cap design minimizes the risk of contamination during handling, enhancing the integrity of stored contents and ensuring the reliability of your cryogenic storage.