Our best filter. Fits all PUR faucet mounts. Reduces more contaminants than any PUR faucet mount filter. Unique Cartridge Design: The PUR Ultimate filter features an activated carbon microfilter that reduces lead, mercury, MTBE, TTHMs and TCE as well as the microbiological cysts, cryptosporidum and giardia. Great Value and Convenience: Easy-to-change replacement filter provides up to 100 gallons (2-3 months) of quality water right from your tap. PUR offers the quality of bottled water for a fraction of the cost. Filters up to 100 gallons/378 liters (approximately 2-3 months). NSF International, a nationally recognized not-for-profit agency for the certification of water filters, has tested and certified this product to reduce the following list of contaminants. Products with the NSF mark are certified to pass a series of stringent independent tests. Tested and Certified by NSF International against ANSI/NSF Standard 53 in model numbers FM-4010 L, FM-4200 L, FM-4300 L, FM-4500 L, FM-4600 B, FM-4800 B, FM-4700 L, FM-4900 L, FM-8100, FM-8200, FM-8300, FM-8400, FM-8500, FM-8600, FM-8700, FM-8800, FM-8900, FM-9000 and FM-9200 for the reduction of 2,4-D, 2,4,5-TP (Silvex), Asbestos, Atrazine, Alachlor, Benzene, Carbofuran, Carbon Tetrachloride, Chlordane, Cysts, Endrin, Ethylbenzene, Heptachlor Epoxide, Lead, Lindane, Monochlorobenzene, MTBE, Methoxychlor, Mercury, 0-Dichlorobenzene, Tetrachloroethene, Trichloroethene, Trihalomethanes, Toluene, Toxaphene, Turbidity, Simazine, and Styrene and Standard 42 for Chlorine, Taste and Odor, and Nominal Particulate Class I reduction. The contaminants or other substances removed or reduced by this water filter are not necessarily in all users' water.