Chrome tailpipe trim fitting

[bc100]

This looks straight foreward but is there anything to watch out for? I have no idea how I lost this but at least the parts onto which it shoud fit look intact.

 

[Blobcat]

Usually held on with a small bolt - that corrodes...

 

[bc100]

Cheers. It is winging its way from Ebay so weather permitting I'll report back ion a day or so.