PUR CRF950Z1 2 Stage Water Pitcher Replacement Filter 1Pack The patented filter cartridge uses a twostage system for crisp refreshing tasting water. The activated carbon microfilter reduces benzene chlorine MTBE TTHMs and sediment. The ion exchange resin reduces lead and copper from your water. The pleated microfilter removes 99.99 percent of microbial cysts. Automatic Safety Monitor Gauge provides continuous indication of filter life. Filters approximately 40 gallons and lasts approximately one to two months. Includes one filter.