The Sands PP (Polypropylene) Spun Filter Cartridges are used for sediment and turbidity removal in RO pre-treatment stages. Available in 1, 2, 5, 10, and 20 micron ratings, these filters effectively remove suspended particles, rust, sand, and other sediments to protect downstream RO membranes. Compatible with standard 10-inch and 20-inch filter housings. Suitable for residential, commercial, and industrial water treatment systems.