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Product Description Advanced EZ Change replacement cartridge provides clean, great-tasting water for drinking and cooking. The RC-EZ-3 basic filtration cartridge is compatible with Cullign US-EZ-1, 3 and 4 systems and can filter 500 gallons and last up to 6 months. Avoid the mess of changing traditional cartridges and eliminates the need for buckets, towels, wrenches, and other tools. Tubing and installation hardware is included. From the Manufacturer The Culligan easy change ice maker/drinking water replacement cartridge The filter cartridge has a 6 Months/500 gallons cartridge life. The cartridge features a twist on twist off mechanism, and has quick connect fittings. The cartridge filter reduces bad taste & odor, chlorine taste & odor, sediment, lead, cysts such as cryptosporidium & giardia, turbidity, atrazine, lindane & particulate class I, The cartridge is NSF certified and is the replacement cartridge for IC-EZ-3, US-EZ-3 & RV-EZ-3. The filter also includes a change reminder sticker.