Kitchen Sink Stopper, 3-1/2 inch Universal Sink Plug Cover for Garbage Disposal Flange Drain - Stainless Steel Brushed

Why the extra ring? Is it suppose to be installed or saved for future use?

Is the diameter of this stopper truly 3 1/2 inches? I bought another that said it would fit any 3 1/2 InSinkerator disposal but was too small.

How has the finish/paint held up over time? My current flange’s paint continues to chip off after only a few months.

Does the rubber have a strong smell?