Product review (3 stars): FREEZER not refrigerator, WEAK magnets
this is the FREEZER gasket; NOT the refrigerator gasket.  This is NOT in the product description.  Seller wants a 20% restocking fee even though it is their fault for an ambiguous listing.
Once you get the right part, It is just ok.  Very week magnets.  Installation takes about an hour.  There are about 18-20 sheet metal bolts securing the gasket to the door.  Somewhat difficult to get the tension right all around the gasket.  Begins to conform after a few days.  The magnets are weak; barely able to maintain a seal.  Conscious effort is needed to make sure door is closed.
After removing the old gasket; found the lack of seal was due to an accumulation of 20 years of detritus on the bottom edge.  After cleaning this up; the old seal would have worked just fine.