Product review (5 stars): Clicked into place and solved my problem easy peasy!
The gasket in my sink was all torn up and discolored.  I researched and was afraid I'd have to uninstall the entire disposal in order to replace the gasket... Then I saw this and thought I'd give it a try.  It fit perfectly in the drain of my sink and locked in place just above the old damaged one.  I ended up cutting the old one out with a razor blade and everything looks good as new!  It does drain the water a little slower bit not an issue for me!