GE Profile FQROMF Reverse Osmosis Replacement Membrane Reverse osmosis filtration: Water is filtered three times Includes one membrane: Membrane fits PXRQ15F, PNRQ15F, PNRQ20F, PNRQ20R and PNRQ21R reverse osmosis filtration systems Premium filtration: Certified to reduce lead, arsenic, select chemicals, and 12 other contaminants Twist and lock design: Simple design provides easy, tool-free, no-mess filter replacement 12-month membrane life: Membrane should be replaced once a year for best filtration results"