These aluminum storage canes accommodate a variety of vial sizes and designs. Stepped cane 03755-06 holds five cryogenic vials (1.0, 1.2, 1.5, and 2.0 mL). Standard cane 03755-07 holds six cryogenic vials (1.0, 1.2, 1.5, 2.0, and 5.0 mL).