Replacement cartridge for AP400, Dual action filter provides sediment reduction and the introduction of a scale inhibitor, Replacement cartridge for AP400, Dual action filter equals Sediment reduction and the introduction of a scale inhibitor, Scale inhibitor filter for all the hot water, Scale inhibitor engineered to dose evenly for 9 months, ADA Compliant, Assembled Depth: 7, Assembled Height: 6, Assembled Width: 4, Filtration method: Sand or Other Material Sediment, Product Depth: 7, Product Height: 6, Product Width: 4, Twist and lock design: No, Water filter system type: Under sink, SKU: YROW018