Product review (5 stars): Works Well - All You Could Ask!
This product is identical to the original equipment.  It fit perfectly and works well, both as a "sink stopper" and a magnetic switch for the Insinkerator.  After 12 years, the original had gotten worn to the point that it was very difficult to switch on/off, and was almost impossible to insert and use as a stopper.  The new replacement solved all the above problems.