Product review (1 stars): Do not buy this botched attempt of an OEM product
Buy from Sears, because this product is an OEM attempt by Whirlpool who obviously does not care about quality.  I tried both filters in the dual pack and they rattled the pipes in my frig, spewed black gunk while I cleared the line of air, and taste like backwash from a chemical recycle bin.  I had to drink tap until I could get the REAL filter from Sears.