Set of 5 Coiled Water Filter Cartridges Anti-Sediment 9 Inches 3/4 - 20 Microns Compatible With 10 Inch Filters Standard pre-filtering and anti-sediment coiled cartridges, 20 microns, 9 3/4 inches, for standard 9 3/4 or 10 inch filter holder bowls. Designed for installation on hot or cold water systems, these anti-impurity cartridges are ideal for filtering solid particles and fine organic matter. Benefits of the 9 3/4 inch anti-sediment 20 micron coiled pre-filtration cartridge set: Economical pack, durable performance, strong and robust spool mesh with no fiber residue in water, high resistance to elevated temperatures. Made in Italy and ACS certified. High-quality wound polypropylene construction provides effective pre-filtration of organic impurities, rust, and dust from water. This 20-micron sediment filter coil cartridge fits 9 3/4 and 10 inch filter housings or water purifiers. Ideal for pre-filtration applications, to be installed before a water softener or upstream of an activated carbon filter for drinking water, or for treating rainwater used in irrigation, sanitary systems, or washing machines. For installation, use a standard single or double transparent filter housing with brass fittings, 1 or 3/4 inch, compatible with 9 3/4 or 10 inch size, available separately. These coiled filter cartridges should be replaced at least once per year. It is recommended to use them for water pre-filtration upstream of an activated carbon or ultrafiltration membrane. For optimal purification, pair with a downstream filter cartridge of finer filtration (e.g., 1 micron) to remove residual organic particles.