Easy Change Ice Maker/Drinking Water Replacement Cartridge, 6 Months/500 Gallons Cartridge Life, Features Twist On, Twist Off Mechanism, Quick Connect Fittings, Reduces Bad Taste & Odor, Chlorine Taste & Odor, Sediment, Lead, Cysts Such As Cryptosporidium & Giardia, Turbidity, Atrazine, Lindane & Particulate Class I, NSF Certified, Replacement Cartridge For IC-EZ-3 True Value #802-274, US-EZ-3 True Value #802-373 & RV-EZ-3.