The IF2-CB-2510-D Under Sink Water Filter Set delivers great tasting filtered water straight to your tap. These dual stage water filters work to keep sediments and chemicals out of your home drinking water so that you can enjoy safe clean drinking and cooking water. Specs: 2.5" x 10" Standard size, Micron: 0.5 nominal, NSF Listed Coconut Carbon Block. The IF2-CB-2510-D Filter reduces the following from your water: VOC, Mercury, Lead, Cysts, Chlorine taste and odor, Asbestos, Sediment, Class I Particulates and Rust. IF2-CB-2510-D Specifications: NSF / ANSI listed media, Pre-Filter with carbon block post filter, Fits any standard housing that uses 2.5 x 10" filters, Filters last up to 600 gallons or 6 months. Replacement for the following brand systems: GE, Culligan, American Plumber, Ace Hardware, Pentek, Ametek, Omnifilter, Flotec, Sears. These filters will *NOT* fit the Culligan SY-2000 and SY-2500 systems or any system that does not use standard 2.5" x 10" filters.