Centrifuge Tubes are available in autoclavable Polypropylene, in 15 ml and 50 ml sizes. Tubes are sold pre-sterilized by Gamma irradiation and feature easy to read molded graduation marks and leakproof caps. Centrifuge Tubes are compatible with the Autofil Vacuum Filtration system to allow for sterile preparation of buffers, tissue culture media, microbiological media, and other biological fluids.