Certified To Reduce 99% Of Lead As Well As Other Potentially Harmful Contaminants, Everydrop Filters Offer Convenient, Filtered Water For You And Your Family. For The Cleanest Water, Replace Your Everydrop Filter Every 6 Months (Or 200 Gallons). Everydrop Ice & Water Refrigerator Filter 4 Replaces W11256135 & W11311161