Polysulfone centrifuge tubes are strong and tough like polycarbonate and much more acid- and base-resistant. Can be used up to 50,000xg in refrigerated or non-refrigerated centrifuges. Polypropylene screw closures. NALGENE sealing caps* (Cat. No. DS3132) are available for all sizes. Before autoclaving, just set closure on top of the tube without engaging the threads. Must be filled to 80% of the total capacity.
