Longer lasting appliances- whole house filter designed to reduce sediment from every tap Universal fit - fits most 10-in x 4.5-in high flow whole house drop in style filter systems from major brands including GE, Culligan, Dupont, Brita, OMNIFilter, Whirlpool and others Filters down to 40 microns, the lower the micron the more contaminants are caught and reduced Replace filter every 6 months for best filtration results Universal 4.5-in replacement filter fits A. O. Smith whole house system AO-WH-PREL, Whirlpool WHKF-DWHBB and most major filtration brands Filter is NSF Certified to Standards 42 Includes 1 replacement sediment filter