The PCR mini-cooler helps protect samples from warming. Insulating gel maintains 4 deg C temperature for approximately 3 hours and changes color from violet to pink when temperature reaches 7 deg C. Suitable for 0.2 mL tubes, strips and plates. Transparent lid included. The PCR mini-cooler can be placed at -20 deg C. PCR rack securely holds 96-well PCR plates, tube strips and individual 0.2mL tubes for easy handling. It is alphanumerically marked for sample identification and can be stacked ..(without lids). The PCR box holds the rack for storage, and withstands temperatures from -80 to 121 deg C.