Crystal Quest CQE-RC-04002 Multi Stage PLUS Filter Cartridge Primarily used for countertop and undersink applications because of their low flow rate It features a 6 stages filtration cartridge, which removes hundreds of contaminats from your drinking water Removes harmful bacteria such as E Coli, Fecal Coli form, Salmonella, Streptococcus, and cysts (Cryptosporidium, Giardia)