Designed for one or two , 5 gallon (1, 9 litre) coffee brewers, They also work well with a BUNN HW2 hot water machine, Provides 1 500 gallons (5 678, 1 litres) of superior sediment taste/odor and chlorine reduction @ , 5 gpm, 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, (6, 8 Kg) of coffee/week), Special scale inhibitor provides six months of scale reduction and guards against corrosion, SKU: BNN812