This 4.9-inch cardboard freezer box is a storage essential for any lab and perfectly organizes your microtubes. The solid white hue offers a clean canvas that can be labeled, marked and decorated for easy identification. Each box comes with a deep lift-off lid design to safeguard and store your samples securely. Its sturdy cardboard construction and water-repellent coating preserves the box's shape when stacked or stored in a freezer. Small drain holes are located at the bottom corners to remove any excess liquid nitrogen or water. A 36-place divider is included to hold 15ml tubes.