At a loss for words...

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Originally Posted by bfish

Correct. They're microwave horn antennas........

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My old Whirlpool Microwave doesn't have an antenna........ if I add these will my food re-heat faster?

Correct. It has an unterminated waveguide for broad distribution at close range. You might call it a "nearfield" application... :D

Quote:

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Originally Posted by Audio_by_Goodwill

My old Whirlpool Microwave doesn't have an antenna........ if I add these will my food re-heat faster?

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If it spends much time in front of those you will throw it farther....

I was going to guess a gas burner assembly for a boiler. Probably not heavy enough though. Ignorance is bliss.