photoNalgene Oak Ridge Centrifuge Tubes can be repeatedly autoclaved and provide chemical resistance. Contact-clear to provide easy viewing of tube contents, the tubes are rated to 50,000 x g whether used in refrigerated or non-refrigerated centrifuges. The tubes are available in a range of sizes including 10mL, 28mL, 30mL and 50mL, and are provided with Nalgene Sealing Caps to ensure leakproof performance at maximum rated speeds. Nalge Nunc International