Product Description The GE Reverse Osmosis Replacement Filter Set reduces more than 15 contaminants in your drinking water including chlorine-resistant cysts lead and arsenic. Includes a pre- and post-filter replacement set compatible with the GXRM10RBL system and made for simple and easy filter installation. Recommended replacement every 6 months or 900 gallons for fresh filtered water. NSF/ANSI certified. From the Manufacturer The GE FX12P reverse osmosis filter set fits many GE Smartwater reverse osmosis drinking water systems. This FX12P filter set includes one 9-3/4-Inch long pre-filter and one 9-3/4-Inch long post-filter.