Oak Ridge style sealing caps ensure leak proof service of Nalgene centrifuge tubes and bottles at their recommended maximum speeds (10,000 x g or greater), even when full

Also recommended for spinning hazardous materials compatible with centrifuge tube or bottle material. Before autoclaving, set closure on top of the container without engaging the threads. Fits Oak ridge Tube Size is 28 mL and 30 mL for 21010-003 series, 50 mL for 21010-025 series.