These replacement filters are for use with PUR 3-Stage Faucet Mount filters. Pur"s advanced microfilter can remove cryptosporidium and giardia, and can reduce lead, chlorine, lindane, atrazine, mercury, asbestos, sediment, bad tastes, odors and more from water. Easy to change. Provides great-tasting water. Each filter processes up to 100 gallons and lasts approximately 2-3 months. Made in USA.