AQUA BLUE Replacement Filter Cartidge | Premium Refrigeater Water Filter 3 (One Pack) Efficient Filtration: Effectively reduce the smell of chlorine, remove harmful sediments, cysts lead, chlorine, iron and other heavy metals and other impurities. To create better drinking water. BEST FILTRATION RESULTS: For six months of filter life, in order to obtain the best filtering effect, The filter should be replaced in 6 months or 200 gallons. Our Products are Backed by a Life Time Guarantee and We Pride Ourselves on 100% Customer Satisfaction. NSF CERTIFIED - Retains nutrients in water while filtering cysts, asbestos, particulates, lead, and mercury without leaving odors. Effectively reduce the smell of chlorine, Delivers clean, clear water that looks and tastes great and protects the components of your refrigerator from potential sediment.