3M Filtrete Whole House Grooved Filter, 2pk: * Filters water throughout your home, saving plumbing and appliances from sand, sediment, silt and rust * Great for 2 or less bathroom households * Reduces chlorine taste and odor, sand, soil, silt, rust and sediment based on 3M testing * Universal filter replacements are available in pleated, string wound, carbon wrap and grooved filters * Grooved filters lasts up to 6 months * 5 microns