There are three options for the MWF filter. The OEM GE MWF and one aftermarket option - the Clearchoice CLCH102. All of our filter offerings provide fresh, clear water, keeping you safe from harmful contaminants. The aftermarket ClearChoice is a high quality and cost-effective filter that uses renewable carbon. Like all of our aftermarket filters, they are guaranteed to fit any fridge ready to accept an MWF style filter. All OEM and aftermarket MWF filters reduce chlorine taste, chlorine odor, help to reduce potentially harmful contaminants found in tap water, and keep a healthy dose of fluoride in your water supply. The advantage the original OEM GE SmartWater MWF filter lies in its Standard 42 and 53 certification. The GE SmartWater has been tested and met such NSF/ANSI International Standards for water purification in chlorine, lead, cysts, turbidity, and other chemicals; the aftermarket filters do not have the certification but perform just as effective and at a much lower cost. Therefore, we recommend the ClearChoice CLCH102 filter. Our discount filters come with fast shipping and free returns for up to one year.