CFS COMPLETE FILTRATION SERVICES EST.2006 Compatible OmniFilter Model RS2-DS 2 Pack String Wound Filters Whole House Water Filter Cartridges 5 micron rating Dimensions: 9.75 inches X 2.5 inches Includes two string wound filters Filter Life: 15,000 gallons or 3 months Twin Pack of Compatible filters Compatible to the OmniFilter Model RS2-DS 2 Pack String Wound Filters Whole House Water Filter Cartridges