Renovo Water 02 MUV2 Hollow Fiber Clean Water 0.1 Micron Filters Down To 0.1 Microns And Up To 100000 Gallons. These tubes have a porous membrane wall and work through size exclusion. Clean water is allowed to go through the membrane while larger contaminants cannot fit through the pores. Blocks bacteria E. Coli Cholera Typhoid protozoa Cryptosporidium and parasites (Giardia). Filters down to 0.1 microns and up to 100000 gallons. Boxed. Package Contents: Renovo Water 02 MUV2 Hollow Fiber Clean Water 0.1 Micron Renovo Water REN-M-02: 02 MUV2 Hollow Fiber Clean Water 0.1 Micron Filters Down To 0.1 Microns And Up To 100000 Gallons