Use vial racks to efficiently hold and organize chromatography, scintillation, COD, cryo, serum, or general-purpose vials for everyday use or for storage. The configuration, shape, and size of openings will vary based on intended use. Some vial racks include lids. Since racks may be made from metal or plastic, choose a rack made from materials that can withstand the heat or cold of your application. Store vials efficiently with Thermo Scientific™ National 4mL Screw Top Vial Racks, stackable for even more space savings. Save space in the refrigerator while ensuring a safe working