Molded polystyrene container, with cover, has an internal 12-place support for 1.5 ml microcentrifuge tubes. The space surrounding the tubes is filled with a sealed-in material that maintains the low temperature required for safe storage and transport.
• Maintains a -15ºC temperature for 1½ hours when taken out of a -20ºC freezer
• Will remain below 0ºC for 4 hours