PerformR® centrifuge tubes are designed for reliable performance in all major centrifuges. Spin rates are higher than most popular brands and feature high quality lab certified non cyto-toxic medical grade resin. PerformR® tubes are packaged sterile in reusable/recyclable polypropylene racks or in sterile bulk bags. All sterile products are manufactured from medical grade materials and are radiation sterilized following a validated ISO 11137 method guaranteeing a sterility assurance level of 10-6.