The ability to diagnostically test and use donated blood and plasma is integral to the healthcare system, which makes the integrity and security of their storage paramount. Blood bank freezers typically adhere to American Association of Blood Banks (AABB), American National Red Cross (ANRC) and Food and Drug Administration (FDA) standards in security and refrigeration, providing constant temperatures as low as -40C, as well as multi-level user password protection. A plasma freezer's tough enamel, galvanized steel and aluminum construction materials protect its effective insulation and cooling system. Storage capacity can exceed 50 cu ft for some plasma freezers. It is important to keep in mind a blood bank freezer or plasma freezer with seven day, ink-free chart recorders, and interchangeable upright or under-counter configuration.