The Whirlpool Carbon Block Universal Whole Home Water Filter (WHA4BF5) delivers cleaner, clearer better tasting water throughout your home. This filter is NSF certified to reduce chlorine taste and odor, sediment, sand, silt and rust and last up to 3 months. It is designed for both well and municipal water supplies and has a micron rating of 25. Carbon block filters offer superior chlorine and particulate reduction, there is minimal black carbon dust and they eliminate the settling of media ensuring all water is filtered.. Brand/Model Compatibility: Whirlpool, Omni, Culligan, Watts, Filtrete, 3M, GE, and DuPont. Features: No additional features. Filtration Method: Carbon Block. Micron/Pore Size: 25 Microns. Number of filters included: 1. Pack Size: 1. Product Weight (lb.): 3 lb. Reduces: Chlorine Taste,Odor. Returnable: 90-Day. Water Treatment Type: Whole House Filter Replacements. Product Depth (in.): 4.75 in. Product Height (in.): 9.75 in. Product Width (in.): 4.75 in. Number of filters included: 1. Filtration: Carbon Block