Fortress Filtration Triple Stage 10" x 2.5" Water Filter Housing w/filters 3/4 1 inch/wrench/bracket 3 Stage Fortress Filtration Premium Water Filter Housing Includes 3 New Filter Cartridges! Qty (1) - 5 Micron Sediment Filter Qty (1) - 5 Micron Granular Carbon Filter Qty (1) - 5 Micron Carbon Block Filter Designed to work with either 3/4" or 1" plumbing supply lines. In Stock - Ready to Ship!! - Uses industry-standard 10" x 2.5" filter cartridges. With Fortress Filtration products, you are being protected by the best!