just seen a beeks polystyrene Nuc that takes 14X12 frames, it was at our out apiary, i understand its a Park Bees of Blackheath Polyhive NUC
A National brood box is a better size. Most decent sized swarms would not be enticed into a nuc box.
Regards, RAB
Nuc boxes are pretty hopeless for enticing swarms as the preferred size is 30 litres of volume. This was researched in the States I seem to remember reading.
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