Watts-MAXCL-FF975 C-Max 10 in Full Flow Chlorine Reduction Carbon Block FilterWatts Premier Carbon Filtration MAXCL FF975 C Max 10" Full Flow Chlorine Reduction Carbon Block Filter Thick walled coconut shell carbon block engineered for extreme chlorine capacity and fine particle filtration 80,000 gallon chlorine capacity 1 micron filtration Full flow design Thick wall construction The Watts MAXCL FF975 is built for applications where chlorine taste and odor are persistent problems. Its thick walled coconut shell carbon block