Polypropylene copolymer provides greater chemical resistance than polycarbonate and can be autoclaved repeatedly. Contact-clear tubes allow easy view of contents. Can be used up to 50,000 x g in refrigerated and non-refrigerated centrifuges. NALGENE sealing caps (Cat. No. DS3132) are available. Before autoclaving, just set closure on top of the tube without engaging the threads. Must be filled to 80% of the total capacity.
