Blue polycarbonate lower section filled with a non-toxic gel; gel-filled white or non-filled clear polycarbonate lid with handle. Cat.No. 7-5115-0032 will maintain a temperature below -15°C for up to 2 hours; 7-5115-0012 maintains temperature below -15°C for up to 1 hour. Coolers accommodate 0.2 to 2.0mL microcentrifuge tubes and cryogenic vials. Sixteen inserts included convert 1.5mL holes to accept 0.2 or 0.5mL tubes.