Abdos Cryo Vials with internal threads are designed for the long-term cryogenic storage of biological samples, including cells, enzymes, and reagents. They are specifically designed for freezing in the vapour phase of liquid nitrogen. These vials are manufactured from high-purity, virgin USP Class VI medical-grade polypropylene (PP), which is free from natural rubber and heavy metals. The vials feature a leak-proof cap design with an integrated silicone seal and strong wall thickness, making them an ideal product for transporting samples and specimens. Key Features & Benefits High-Purity Material: Manufactured from high-purity virgin USP Class VI Medical grade polypropylene (PP) conforming to US FDA 21 CFR, and are free from natural rubber and heavy metals. Wide Temperature Range: Suitable for use at temperatures between -196°C and +121°C. Leak-Proof Seal: The cap design includes a silicone seal to enhance sealing. The vials are tested as leak-proof at 635 mm/Hg. User-Friendly: Features a large white frosted portion for easy writing and silk-screen printed graduations for identification. Single-Hand Operation: Available with a "Star Foot" design that grooves into the Abdos P20616 single-hand cryo holder rack for convenient operation. Certified Pure: The vials are certified free from DNase, RNase, endotoxins, heavy metals, human DNA, ATP, and pyrogens, and are also GC/MS tested. Sterile: Sterile versions are validated according to ISO 11137 for a Sterility Assurance Level (SAL) of 10-6. IVD Certified: Best suited for IVD use (IVD Certified product). Autoclavable: The vials are autoclavable.