Oak Ridge centrifuge tubes are made for high speed refrigerated or non-refrigerated centrifugation. Molded from durable, chemical resistant polypropylene, these Oak Ridge centrifuge tubes have round bottoms and consistent wall thicknesses for centrifugation at up to 50,000 x G when filled to 80% of their capacity. Oak Ridge style tubes are autoclavable and re-usable and are designed with leakproof linerless closures.