GE RPWFE2PK RPWFE 2 Pack Refrigerator Water Filter GE's most advanced filtration ever with easy tool-free replacement Tested and verified to filter 5 trace pharmaceuticals including ibuprofen, progesterone, atenolol, trimethoprim, and fluoxetine ( the contaminants or other substances removed or reduced by this water filter are not necessarily in all users' water) Nsf certified to filter contaminants such as cysts, lead, mercury, asbestos, and select pesticides and chemicals Nsf certified for structural performance and to filter chlorine taste and odor and particulates