Pack of standard pre-filtering and anti-sediment coiled cartridges, 20 microns, 9 3/4 inch, for standard 9 3/4 or 10 inch filter holder bowl. Suitable for installation on hot or cold water systems, these anti-impurity cartridges are ideal for filtering solid particles and fine organic matter. Features of the 9 3/4 inch 20 micron anti-sediment coiled pre-filtration cartridge set: economical pack, durable design, and widely preferred by customers. Strong and durable spool mesh ensures 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. 20 micron sediment filter coil cartridge for 9 3/4 and 10 inch filter housings or water purification systems. Ideal for pre-filtration applications, installed before water softeners, or upstream of activated carbon filter cartridges for drinking water, or for treating rainwater used in irrigation, sanitary systems, or washing machines. For installation, compatible with standard single or double transparent filter housings with brass fittings, 1 or 3/4 inch, in 9 3/4 or 10 inch sizes. These coiled filter cartridges should be replaced at least once per year. Recommended for use in pre-filtration setups upstream of activated carbon or ultrafiltration cartridges. It is advisable to pair with a downstream cartridge of lower micron rating (e.g., 1 micron) to ensure complete water purification and removal of residual organic particles.