Polycarbonate freezer boxes with openings below each tube for reading the 2D barcode. Clear lids and bright and sunny yellow base so it cannot be easily missed AltemisLab cryoboxes for 2D barcoded tubes are coded with their own special symbol to identify the tubes and the storage box. This cryotube box is compatible with large format 1.2mL and 2mL 2D barcoded tubes