This listing is for 3 filters. Removes Dirt, Rust & Sediment Polypropylene Fibers Meet FDA Guidlines 1 Micron Filtration 1 Micron Removal of Dirt, Rust & SedimentBB/Full Flow Size 20" × 4.5" Sediment Cartridge Shelco has created the MicroSentry cartridge, setting a higher standard for industries requiring cartridge filtration. Shelco equipment makes achieving precision patterns a matter of standard procedure. State of the art computerized production machinery takes the variables out of custom winding and enables production of filter cartridges that are accurately wound from a single strand of specially selected fibrous roving material, wound around a perforated core in a nearly perfect geometric pattern. Features and Benefits: Polypropylene fibers for purity and chemical compatibility Meets FDA requirements for food & beverage contact Standard cartridges rated for temperatures to 140°F High temp cartridges available with stainless steel center tubes Packaged in individual poly bags for cleanliness Available in wide range of lengths and micron ratings