Materials:  Polycarbonate  sealing cap* (polypropylene screw closure with silicone gasket) Excellent mechanical strength. Molded-in graduations. For use in refrigerated and non-refrigerated centrifuges up to 27,500 x g. Must be used with NALGENE adapter for conical-bottom centrifuge bottles (Cat. No. DS3126-0175). Before autoclaving, just set closure on top of bottle without engaging the threads. For proper performance these bottles must be filled to at least 80% of the total capacity. |