Designed for one or two 1/2 gallon coffee brewers. They also work well with BUNN HW2 hot water machine. Provides 1 500 gallons of superior sediment taste/odor and chlorine reduction @ .5 gpm. Listed at NSF Standard 42 Class I. 5 micron graded density filtration for long life. Perfectly sized to ensure quality coffee and long-term performance of 1 to 5 pot brewers (up to 15 lbs. of coffee/week). Special scale inhibitor provides six months of scale reduction and guards against corrosion.