These Carbon Block filters provide an excellent cost-to-performance value. They have a high chlorine reduction, great dirt-holding capacity, and greatly reduced carbon fines in your water. These Carbon Block Filters are ideal for point-of-use (POU) and Reverse Osmosis applications.They can be used in a wide range of applications such as residential whole house, food service, commercial, and industrial. These carbon blocks are great for displacing traditional GAC (Granular Activated Carbon) and PAC (Powdered Activated Carbon) filters in application where high chlorine reduction is needed.