This filter provides high flows and long service life in the most compact, lightweight cartridge available today. Rated to filter up to 100 gallons of water. Removable, replacement, filtration cartidges available. (Weight - 1.05 oz. / Length - 5 inches) Tested and Certified to remove: Greater than 99.9% Protozoans (Cryptosporidium and Giardia), Greater than 99.9999% Bacteria (Raoutella terrigena), Greater than 99.99% Viruus (MS-2 Bacteriophage). Meets or exceeds ANSI / NSF Standard 53 for removal of Protozoan cysts, Bacteria, and Virus. Testing performed by independent, accredited laboratory; DOD, NELEAC (ISO-17025), FL DOH Laboratory #E82924, EPA# FLO1147.