This bundle helps you get the most out of your refrigerator. The WATER FILTER is certified to reduce 99% of lead as well as other potentially harmful contaminants. Whirlpool® Refrigerator Water Filter 4 replaces W11256135 & W11311161. The FreshFlow™ AIR FILTER reduces common food odors in the refrigerator and is 15 times more powerful than baking soda. Replacing the air filter will require no disassembly or repair experienc. The PRODUCE PRESEVER absorbs ethylene allowing the ripening process of many produce items to slow down. As a results, certain produce items will stay fresh longer that are kept in your crisper drawer. It extends freshness of produce up to 25%. Packet contains two pouches which will be put in the housing in your crisper drawer. Packet also contains a status indicator to help you remember to change the pouches. It is recommended to replace your Whirlpool® filter every 6 months (or 200 gallons), and also recommended to replace the air filter and produce preserver every six months.