Manufactured from black, RNAse/ DNase-free polypropylene this range of black screw-top centrifuge tubes are available initially in 15ml and 50ml sizes.Providing secure storage of light sensitive materials, these tubes are fully resistant to most organic solvents, can be autoclaved clean and enable high integrity storage of samples and reagents down to -80°C. They are supplied sterile and include a recessed HDPE lid that prevents leakage. Each tube includes a frosted area to enable marking for easy identification.