This is a new very correct and high quality fuel tank inlet grommet. This is the large one for the M38 and M38A1 military jeeps with the large mouth fuel tank. These are almost always dried out or missing.  This protects both the body and fuel tank neck from rubbing. This is a  great detail item for your jeeps finishing touches.   QTM Parts

NOTE: Use a little petroleum jelly on this when you install it and it makes it very easy. 

 Paint and some large or fragile items can't be combined.