can anyone identify this bushing?

Panman said:

There is a bushing on one side of the shock.

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Stretch160 said:

this past weekend I rebuilt my forks and replaced my rear shock.
after completing the work, I found this mysterious steel bushing on the garage floor where i had been working.
the inside diameter is 1/2" the outside diameter is 11/16" and the length is 5/8"
it had a coat of grease on it, so i pulled the rear shock back off, but, couldn't find any missing bushings.
everything seems to be functioning, but, it must belong somewhere.

any one recognize it?
View attachment 2402

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Mortenk said:

Maybe your new shock had this already? I find it hard to believe that you could install it properly without this bushing in place...you would surely notice I think

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