Product review (5 stars): Small Home Improvement, Big Change
I don't know why I waited so long to replace this part in my sink, but after the old one stopped seating properly and I stepped back every time I turned on my disposal to avoid flying food chunks, I decided that was enough. As another reviewer said, I was surprised how much my other one shrank - down to 3" diameter as opposed to the 3.35" of the new one. It was snug to fit in, but worked perfectly once it was in place.