This is an excellent, NSF Certified filter that you can feel confident will match up to the GE brand without paying their high prices. NSF's Mission: Founded in 1944, our mission is to protect and improve global human health.  Manufacturers, regulators and consumers look to us to develop public health standards and certifications that help protect food, water, consumer products and the environment. As an independent, accredited organization, we test, audit and certify products and systems as well as provide education and risk management.