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The MSR TrailShot Replacement Cartridge serves as a replacement to your TrailShot Microfilter, restoring flow rates after your previous filter cartridge is spent. This replacement cartridge filters up to 2000 liters of water before requiring a replacement and cleans one liter of water in as little as 60 seconds. It eliminates harmful contaminates, including bacteria, protozoa, and suspended particulates found in many lakes, streams, and waterways.