This listing is for two filters. Carbon Block CartridgeRemoves Chlorine, Taste & Odor10 Micron FiltrationFits Standard 10" Housings Features:Class 1 Chlorine, Taste & Odor Reduction10 Micron Filtration5,000 Gallon Capacity @ 1 PPM ChlorineFlow Rate: 1 GPMMade with Premium Quality Coconut Shell Activated CarbonCartridges are Individually Shrink Wrapped