Replacement kit for Watts Zero Waste RO System ZRO4/FMRO-4ZW This kit contains: 5 Micron Sediment Filter 2 x 5 Micron Carbon Blockﾠfilters 10 inch GAC Final Filter Specifications: The recommended filter change is every six months.ﾠ The final filter is once per year*. *Note: Filter life may vary based upon local water conditions or use patterns. Filters are for the system pictured below: ﾠ