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Queen excluder?

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Joined
Jun 9, 2009
Messages
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Location
Kirkbymoorside, North Yorkshire.
Hive Type
national
Number of Hives
9
Does anybody know the tolerances of the hole size on a queen excluder. I've looked at Cushman's website and he gives variations between 4.22mm and 4.38mm. Will 5mm be too big allowing the queen through, and 4mm be too small to let workers through?
 

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