The 2 Pack Zero Water 5 Stage Advanced Filtration Replacement Water Filters are designed for Aqua Optima and Brita water pitchers. These white filters have a 5-stage filtration process including sediment, carbon/charcoal, and carbon block to remove lead contaminants. With a capacity of 22.5 gallons, these filters are suitable for both commercial and household use. The ZeroWater brand ensures high-quality filtration, and this pack includes 2 additional generic brand filters for extended use. Made of plastic and weighing 1.3 lbs, these filters are a reliable choice for clean and safe drinking water.