This is a new very correct fuel neck grommet. This is the small one for the CJ2A, CJ3A, CJ3B, and CJ5 fuel neck inlet. These are always missing or dry rotted. This protects the fuel neck from rubbing against the body. This is much too small for the M38 and M38A1 Military jeeps.
NOTE: This is much easier to install by first lubing it up with petroleum jelly.