Undersink replacement water filter for water filtration systems that use 9 3/4 inch x 2 1/2 inch cartridges. This filter uses carbon block media to reduce a variety of unwanted contaminants including sediment, turbidity, cysts, particulates, and unpleasant chlorine taste and odor. This filter features a nominal micron rating of .5 meaning it can reduce particulates down to .5 microns in size and larger. With a 12 month life span this undersink filter delivers a great value for a high quality filtration. Order your Culligan D-30A level 2 undersink filter replacement cartridge today!