Product review (1 stars): Piece of junk
This appears to be the same junk I received with my disposer.  The flimsy rubber gasket comes off nearly every time I remove the stopper from the sink. A durable machine like this should not be sold with such a cheap part. The opening of Waste King is a quarter of an inch smaller than most disposers, so a stopper from the hardware store will not fit.
If anyone knows of a replacement that will fit, I'm listening.