With cell measurements of 12 x 12 x 25 mm, the 50-place hinged boxes are specially designed to hold 1.5 and 2.0 mL cyrogenic vials. The boxes come with durable lids that have a rolling hinge that can endure a freezer's exteremely cold temperature of up to -90�C. This product has alpha-numeric markings that allow users to conveniently and easily organize and identify the samples. It is sold in a pack of 5 natural-colored boxes.