creates better tasting water and ice. You will no longer be drinking the particles that are lurking tap water. Our site sells four options of the WF-L500. There are aftermarket or factory original models available. The aftermarket versions are the ClearChoice CLCH100 or the EcoAqua EFF-6002A. We recommend the ClearChoice because of its great mix of low cost and high quality. The OEM WF-L500 is the Whirlpool EDR5RXD1 and the Whirlpool 4396508. The Whirlpool replacements typically costs more but has NSF certifications. The WF-L500 is compatible with a large number of filter models, check our product comparison chart below. Be sure to change twice a year or more frequently with heavy use. The WF-L500 refrigerator water filter comes with free shipping and returns.