Product review (3 stars): Why do they shrink?
The reason for only a 3-star rating is not because the splash guard doesn't fit or doesn't work, it's because they don't last and you have to get the stopper along with it, which raises the price, is of no use to us, and we already have 2 stoppers. They should sell the splash guard by itself. The original splash guard came with a Waste King top-of-the-line, lifetime-warrantied disposal that is only 4 years old. What apparently happens to the guards is that they SHRINK! Given that they're made of some type of rubber, I don't understand why they shrink, but they do. And because the lip in the disposal that they sit on is so tiny (~3/32"), it doesn't take much shrinkage for the guard to fall into the disposal when you push food thru it.

Bottom line: Whoever makes the splash guards needs to find another polymer or material that is dimensionally stable.