Designed for one or two .5 gallon or 1.9 litre coffee brewers. Works well with a BUNN HW2 hot water machine. Provides 1,500 gallons or 5,678.1 litres of superior sediment, taste, odor and chlorine reduction at .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. or 6.8 Kg of coffee per week. Special scale inhibitor provides six months of scale reduction and guards against corrosion.