This replacement ceramic cartridge for Combi removes most microorganisms including Bacteria and Giardia and can filter up to 13,000 gallons. The Combi Microfilter is part of the Katadyn endurance series. Its 0.2 ceramic depth filter removes 99.9999% Klebsiella terrigena, and 99.99% Giardia/Cryptosporidium. The Katadyn Carbon for Combi will provide approximately 1 quart (1 L) of water per minute. One cartridge will filter up to 13,000 gallons (50,000 l) depending on water quality.