Premium Filtration: GE's genuine XWFE filters are certified to reduce chlorine-resistant cysts, lead, select medications, and 50 other impurities (not present in all users' water) Medication Reduction: Reduces specific medications, including ibuprofen, progesterone, atenolol, trimethoprim, and fluoxetine (not present in all users' water) Buy with confidence: Genuine filters are certified to NSF/ANSI drinking water treatment standards to improve your water quality and meet the requirements of independent and certifying organizations. Counterfeit and deceptively labeled products cannot Easy filter replacement: No tools or water shutoffs are required to replace the filter cartridge in the refrigerator Six-month filter life: For best filtration, replace the filter cartridge every six months or 300 gallons (or sooner if flow rate drops significantly) XWFE replaces XWF: Compatible with all refrigerators using XWF