Blue PC lower section filled with a non-toxic gel; gel-filled or non-filled clear PC lid with handle. Order No. 5400932 will maintain a temperature below - 15 °C for up to 2 h; Order No. 5400929 will maintain temperature for up to 1 h. Coolers accommodates 0.5 to 2.0 ml microcentrifuge tubes and cryogenic vials. 16 inserts included convert 1.5 ml holes to accept 0.2 or 0.5 ml tubes.