Product review (3 stars): It fit perfectly.
Actually it does it's job fantastic.  All that chewed up stuff that had been composting in the back of my vegetable drawer doesn't get flung back up in my face when I turn it on.  But there is a difference in this and the one I had before.  The flaps are a little stiffer and the hole in the center seem a little smaller.  That may be why I don't have to make sure my mouth is closed when I turn on the disposal like I used to do.  But it does make it harder to get things to go down in the disposal.  I usually put a bunch of stuff in the sink and then grind it all at one time to save water.  But if you do run water in that sink, it won't let it drain down.  But that in itself is really saving water for when you do get around to grinding up your stuff.  It just makes my sink look worse that it usually does.  Then I have to work a bit harder to get things to go down when it is time to dispose.  But still a great product but I had to give it three starts for 'OK.'