PR-3 Features: -Set of 3 pitcher filter replacement cartridges.-Level 2 extra filtration.-Quick and easy replacement with no tools required.-Filter life: 50 Gallons or 2 months.-Reduces bad taste and odor, aesthetic chlorine taste and odor, sediment, mercury, copper, zinc and particulate class VI.-NSF certified. Dimensions: -Overall dimensions: 5" H x 7" W x 2.25" D.