OK, We have not done trivia in a while and ran across this items yesterday working on a parts car and thought it would be a good trivia question.   See picture below and name that part! 

Two hints: It fits inside something and definitely not something you would find on every 1963/64 Cadillac.

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Is it inserted into a hose to prevent collapsing ? Or is it used on a door panel like for a window crank ? Or is it put in the gas tank neck to prevent someone from siphoning gas ….

OK... 3 guesses and the 3rd is correct. It is rather large, and goes in the metal gas tank filler neck to prevent siphoning gas. I guess it would prevent anything from getting pushed into the tank.. but siphoning gas prevention would be the main use! 

SO, RAY.... HAVE A CIGAR!!!

Size matters. Even if wife says it doesn't... ;-)

Can I suggest using a reference like a BIC-lighter or a soda-can to get an idea about size for next trivia?

I intentionally didn't want to give a size reference! In fact I tried to take picture in a way that would not indicate size.  Makes it more fun not knowing the the size!

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