Product review (1 stars): Doesn't fit as a 4396701 replacement in Kitchen Aid refrigerator
Finally opened the package.  Does not fit my fridge.  I have a Kitchen Aid refrigerator, and it calls out replacement cartridge 4396701.  This product claims fit, but it will not.  The overall cartridge size is correct (length, diameter), but the locking-ramps at the end with the O rings have a different geometry, and will not engage into the refrigerator at all.