The Aqua-Pure by Cuno AP124 water filter replacement cartridge reduces dirt and rust up to 50 microns, The AquaPure AP124 dirt and rust water filter cartridge is made from an exclusive process using pure white celluose fibers, As water passes from the outer surfaces into the center of the cartridge, the filtering pores become increasingly smaller to remove even microscopic particles, Unlike string-wound and pleated paper cartridges, the rigid, sturdy construction of the Aqua-Pure cartridges are able to withstand high pressure drop and stressful conditions such as water hammer, Dimensions: 9-3/4"" L x 2-5/8"" W, 50 Micron Nominal Filtration, Flow Rate: 8 gpm/30, 3 lpm, Dirt and Rust Reduction, Graded Density for Long Life (up to 30% longer!), Rigid Construction Withstands Stressful Conditions, Use on Hot and Cold Water (up to 100 F), Made from FDA (CFR 21) Compliant Materials, SKU: CWD1847