The Eppendorf iceless cold pack reliably cools samples for more than an hour at 0 degrees C when precooled for 2 hours at -20 degrees C. Temperature safety is indicated by a color change when temperature is exceeded. The pink pack turns violet when ice cold. The pack turns to its original color (pink) when temperatures are above 7 degrees C. The special cone contour prohibits freezing of samples. This space saving cold pack is superior to an ice bath and keeps samples safe from contamination. It can be used for the protection, transportation and storage of sensitive samples, as well as for the safely stopping reactions. It is designed for use with 0.2mL and 0.5mL reaction tubes/PCR tubes, tube strips and PCR plates 96. Color: Pink. Capacity: 96-Well Plates or PCR Tubes. Tube Size: 0.2mL and 0.5mL. Temperature Maintained: 0 degrees C For One Hour. Precooling Required: 2 Hours At -20 degrees C. Color Change Temperature: At 7 degrees C.