With a standard volume of 0.2 mL, PCR tubes are used in DNA extraction, PCR, qPCR, and other molecular biology applications. Their small volume reduces the use of expensive reagents and allows rapid and efficient heating and cooling in a thermocycler, for example during a PCR. These tubes are ideal for DNA work with small numbers of samples. Manufactured from medical grade polypropylene, they are certified free of RNase, DNase, DNA and PCR inhibitors. The tightly fitting attached caps are easy to open and close with a click, and provide optimal sealing to minimise evaporation. The flat cap lid allows clear labelling of each tube.