Insinkerator MGK-00 4 in. Rubber Mounting Gasket Kit, Black

Highly recommend. DIY skills a plus. As installation instructions included on the package are rather basic, I highly recommend watching a few youtube installation videos. For instance, when reinstalling the unit, pressure must be applied to the bottom of the unit while simultaneously reaching up and turning the locking ring. I used a bucket under the unit to keep it from dropping too far while the gasket was being replaced. I used a 4 foot long 4 inch wide by ½ inch thick wooden board with one end placed under the unit to gain some leverage while reinstalling the unit. This allowed me to use both my hands to push up on the locking ring while I used my leg to gently pull down on the other end of the board which pushed the unit up enough to allow the locking ring to engage. Not sure I would have succeeded without the board. All is back together now. The gasket looks great and there are no leaks.

Problem with installation was that the disposal had to be completely removed from sink and all plumbing to replace the baffle.Then, of course, you have to deal with all the little leaks when put back together again.Also,aligning the disposal to the undersink holding ring was not easy. The disposal is very old, hopefully newer designs have done away with that. InSinkErator makes a great product. This one is still working great