GE most advanced filtration ever. Nsf Certified to reduce vocs (volatile organic compounds) and over 15 harmful contaminants including cysts, lead mercury, and unwanted Chlorine taste and odor. Reduces 5 Select pharmaceuticals including Ibuprofen, progesterone, atenolol, trimethoprim, and Fluoxetine. Note: the contaminants or other substances removed or reduced by this water filter are not necessarily in all users water. Replacement water filter for GE and profile brand refrigerators. Easy tool-free replacement.