This is for one. Well Water Whole House Filtration System Dual Stage Complete System Commercial Grade Sediment Odor Taste Rust, 1 Ports. Interchangeable with AP110 & AP-117. 2.5″ x 10″ Standard Size Filter. High Quality NSF Certified Coconut Activated Carbon and Polypropylene Filters. Original OEM replacement for the LWH-D Whole House Filtration Systems. This item is in the category “Home & Garden\Kitchen, Dining & Bar\Small Kitchen Appliances\Water Purification\Water Filters”. The seller is “umanhunt” and is located in this country: US. This item can be shipped to United States.