This listing is for 2 filters. Features:Class 1 Chlorine, Taste & Odor Reduction with Lead Removal5 Micron Filtration18,000 Gallon capacity @ 1 PPM ChlorineFlow Rate: 6 GPMMade with Premium Quality Coconut Shell Activated CarbonFits all Standard 20" Full Flow/BB Filter HousingsCartridges are Individually Shrink Wrapped