Help Identify a Part, Please

[truckster]

I started putting my steering column back into the Blazer yesterday. It's been a few years since I tore it apart, and I sometimes have trouble identifying parts I bought way back when. I bought a new firewall seal, but it's different from the original; it's about 1/2" thick foam. And then there's this part - I'm not even sure it goes on the steering column, but its inside diameter fits the column snugly. If it does go on the column, where does it go? Pics I've found on the board and exploded diagrams from LMC don't seem to have it.

Thanks in advance.