Two dusters in one tube...

My husband brought home some feather dusters today. There was one tube but when it opened up, there were two seperate dusters squeezed in the same tube! The bottom end of the tube is branched, so it looks like the two dusters grew together.

Do dusters mate like that? I never thought about dusters making babies before - how does that work?

Here are some not-so-great pictures for your enjoyment.
 
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