MATRIKX +CTO/2-five (5) micron, 4-1/2" x 20":

The most widely used carbon block cartridges in the world and provide unattainable performance at the lowest price point. *Excellent for the removal/reduction of free chlorine and all chlorine bi-products, Organic chemicals and volatile organic chemicals, improves odor and taste. *Excellent for most municipal/potable water supplies filtering down to 5 microns.