Katadyn Befree Replacement Cartridge. 1 microns Age Group: Adults Application: Travel Fabric/Material: Hollow Fiber Water Treatment Type: Particulate Water Filter Method: Bottle Cartridge Life: 1000 L Field Maintainable: Yes Flow Rate: 2 Liters per min Features of Katadyn BeFree Replacement Cartridge: Fast flow rate Stay clean drink nozzle 0.1 micron pore size Package Contents: Katadyn BeFree Replacement Cartridge Katadyn BeFree Replacement Cartridge