Product review (5 stars): Perfect fit.
When we put in a new InSinkErator a couple of years ago, it was immediately apparent that the rubber in it was ugly.  Then it got uglier.  I figured that I would have to -- at a minimum -- remove the garbage disposal and put a new flange in.  Or, I could keep listening to my wife complain about it.

Then I found this item.  Ordered it.  Waited 2 days. Opened the package.  Pushed it down in the drain.  It snapped in place.  I tested how it drained.  Perfectly.  I tested how it handled food. Perfectly.

And, I did not have to remove the old ugly rubber gasket stuff.

It has been two weeks with no complaints from my wife and no issues with the drain.  Problem solved.