Product review (5 stars): THESE ARE GENUINE FILTERS NOT LIKE THE FAKES ON EBAY
<a data-hook="product-link-linked" class="a-link-normal" href="/Whirlpool-EDR3RXD1-EveryDrop-by-Refrigerator-Water-Filter-3-Pack-of-1/dp/B00UB441HS/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">Whirlpool EDR3RXD1 EveryDrop by Refrigerator Water Filter 3 (Pack of 1)</a>

Many if not all of the water filters listed on other sites are COUNTERFEIT. These are real - etched, not raised, individually unique serial numbers,
 and other security features.  THESE ARE GENUINE.