SpectraTube™ brand 15ml sterile centrifuge tubes with color coded caps for easy sample ID. Conveniently packed 50 tubes (5 different color caps) per foam rack with red, orange, green, yellow and blue caps and a total of 10 racks per case.

These tubes are made of premium polypropylene, with exceptionally uniform wall thickness for clarity and centrifugal strength. Each tube has printed graduations and a marking spot. Screw caps are flat for easy marking and are made of polyethylene.

Supplied sterile, while the tubes can be autoclaved the polyethylene caps can not. Tubes and caps may be used for sample storage at temperatures as low as -86°C. The maximum centrifugal force is 12,000xg.

Tubes and caps are certified sterile, RNase, DNase, and Pyrogen free. Suitable for stem cell research as well as many other laboratory uses.