Product Description Replacement for models: GE® RPWFE, WSG-4, DWF-36, WF277, R-3600, MPF15350, OPFG3-RF300, RWF1063, RWF3600A. Authoritative NSF certified: Maxblue refrigerator water filter is NSF 42 certified to reduce a wide range of harmful substances in water, and also certified by authoritative NSF 372 for lead-free materials. Multiple certifications confirm product quality and effect. The built-in chip in the filter is Precisely Designed to Fit the refrigerator with no worries about misinformation. Meanwhile, our professional research team makes effort to produce refrigerator filters with exquisite engineering design without water leakage issues. Brilliant filtration: Our filter can efficiently reduce various heavy metals, cadmium, THM, VOCs, chlorine, odor, and other impurities, which has precise filtration effect to provide safe and purified drinking water for you and your family. The data is tested by a third- party lab. Premium filter material: Maxblue adopts 100% selected coconut shell carbon block that has larger surface area and more micropores than inferior carbon block, which has a better adsorption effect, thereby improving the taste of water. Month installation stickers: Simply stick it onto your replacement water filters to know when it’s time to change it. Keep you drinking fresh with a little add-on. The filter life is 6 months or 300 gallons, which may vary based on the water condition. Hassle-free installation: The way we spend our time defines who we are. Maxblue strives to save your precious time by offering tool-free refrigerator filter replacement. Installation can be easily completed within a few minutes. NSF 42 & 372 certifiedThe refrigerator water filter replacement adopts lead-free material, which reduces lead, cysts, benzene, chlorine, mercury, phenytoin, ibuprofen, naphthyl acid, estrone, bisphenol A, nonyl pheno, taste and peculiar odor.For NSF 42: Certificate C0145653. by NSF International, 2022.Multiple filtration performanceThe product using multi-stage filtration technology and premium coconut shell carbon block to absorb chlorine, organics and reduce potentially harmful impurities from the water.