KleenWater Whole House Water Filter, Complete Filtration System, Includes 3 Dirt Rust Sediment Cartridges, Best for Home or Commercial Applications 1.5 Inch FNPT threaded inlet/outlet filter head made of reinforced polypropylene Equipped with filter wrench, mounting bracket and hardware Transparent housing made of safe PET (polyethylene) plastic Three 5 micron dirt, rust and sediment filters - Housing accepts any universal 4.5 x 9.75 inch cartridge