Vial is produced using automated precision manufacturing to ensure consistency across each vial, as well as a low failure rate. Made from 100% medical-grade polypropylene with a silicone O-ring for a secure seal, it is capable of withstanding extreme temperatures, as low as -321°F (-196°C) and as high as 250°F (121°C) as well as up to 18,000 g-forces. Using the 49.2 x 12.5-mm conical vials can increase freezer storage by up to 23% compared to other major brands. They come with a screw cap that can be color coded with inserts for instant specimen identification and have a special skirted base design that allows them to be locked into the cryogenic tray for single-handed manipulation.