Whole home filtration system: Filtered water for your whole home Includes one filter: Compatible with GXWH40L, GXWH30C, GXWH35F, GXWH38F, GNQH38S and most systems with 10" x 4.5" filters NSF Certified: Certified to reduce chlorine taste and odor, sediment, sand and rust in your water, appliances and plumbing fixtures