Interesting ebay find.... Frame Plugs
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No moisture gonna be trapped when there are 2-3 smaller holes on the underside of the square tube! Actually would be a great place to hide a set of extra keys in a baggie. OOPS! Here are pics of mine. For $12.99 its a way cheap Mod. Sorry don't have a pic of the round plugs.
https://www.f150online.com/galleries...7328&anum=8767
https://www.f150online.com/galleries...7328&anum=8767
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