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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 16-place divider is included to hold 50ml tubes.