Nalgene Rapid-Flow Sterile Disposable Filter Units. Nalgene Rapid-Flow membrane support system provides fast flow and high throughput. Upper chamber separates from storage bottle for easy access to filtrate. Leakproof screw cap eliminates pH shift in storage bottle to provide longer life for stored media. Upper chamber of filter units is clearly marked with pore size, membrane type, catalog number, lot number and expiration date. Padless membrane support minimizes foaming of proteinaceous samples. Non-pyrogenic and non-cytotoxic. Gamma radiation-sterilized and individually bagged for a 5-year sterile shelf life. Low protein binding, excellent flow rates, little or no loss of specific proteins. No wetting agents to affect sensitive cell culture lines. Much lower extractables than standard CA membranes makes SFCA a better choice for cell culture. Upper 250ml. Receiver 250ml. Membrane SFCA. Pore Size 0.2 µm. Diameter 50mm. Pack Qty 12. Type Filter Unit.