Cryogenic tape for identifying various metal containers for long-term cryogenic storage, as low as -196°C (-321°F). This cryo tape can be used to identify stainless-steel and aluminum racks, X-ray cassettes, film cans, and more. The tape should be applied at room temperature before being placed in liquid nitrogen or ultra-low temperature freezers for subsequent storage. Writable with our permanent cryo markers, this tape for metal racks can withstand storage in liquid nitrogen, transportation on dry ice, multiple freeze-thaw cycles, as well as gamma irradiation (up to 50 KGy).