Replacement .2 Micron Emergency Survival Gravity Water Filter with active carbon inside and 10 Micron Prefilter Sock. Includes: Our Ceramic Element is Silver Impregnated to stop bacterial growth and filters water down to 0.2 microns which is incredibly small and our own design 10 micron prefilter sock to extend the life of the ceramic filter element. Removal capabilities as follows: 100% Giardia Lamblia 100% Cyclospora 100% removal of live Cryptosporidium (WRc Standard) 100% removal of Cryptosporidium 100% removal of E. Coli, Vibrio Cholerae 99.999% removal of Salmonella Typhil,Shigella Dysenteria, Kiebsiella Terrigena 99% Arsenic 5 and 99% Arsenic 3 99% Hydrogen Sulfide 95% Chlorine and Chloramines 99% Taste 99% Odor 98% Aluminum 96% Iron 98% Lead 90% Pesticides 85% Herbicides 85% Insecticides 90% Rodenticides 85% Phenols 85% MTBE 85% Perchlorate 80% Trihalomethanes 95% Poly Aromatic Hydrocarbons 99.999% of particles larger than 0.5 micron 99.999 Anthrax 99.7% of particles larger than 0.3 micron (Staffordshire University Labs) 98% of particles larger than 0.2 micron (Staffordshire University Labs) Ceramic Filters Do Not reduce TDS (Total Dissolved Salts)