Katadyn Hiker Pro Rpl. Cartridge. Ideal for family and group camping No pumping required – just fill and hang! Uses the Hiker PRO cartridge for fast flow and easycleaning Comes with 2.6 gallon waterbag, outlet hoseand on/off valve 0.3 micron glassfiber filter with activated carbon coreand AntiClog technology Flow rate: Up to 16 oz. per minute.