Add some color to your PCR sample preparation! The Eppendorf PCR-Cooler is ideal for setting up PCR reactions in 0.2 mL and 0.5 mL PCR tubes as well as 96-well PCR plates. For ease-of-use we included a temperature indicator that changes the color of the PCR-Cooler from violet to pink or dark blue to light blue when its temperature exceeds 7°C.