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Designed for use with their hydration engines, GeigerRig's In-Line Virus Water Filter is rated to filter up to 100 gallons of water and removes better than 99.9% of Protozoans (Cryptosporidium and Giardia), Bacteria (Raoutella terrigena), and Virus (MS-2 Bacteriophage). It meets or exceeds ANSI/NSF Standard 53 for removal of protozoan cysts, bacteria, and virus.