Top-Bar Hive Nucleus Box

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New style top bar hive nucleus box made from clear, FSC® certified Douglas Fir. Fits 19" top bars. This nucleus box does not fit the old style 17" long bars. 

The perfect box for swarm catching, splits, and overwintering nucleus colonies. Easily transfers combs and bees to and from full sized Bee Built top bar hives. 


  • 19" wide, 14" long, 9" tall douglas fir top bar hive nucleus box
  • 22" long x 15¾" wide telescoping cover
  • 8 19" x 1" one piece douglas fir top bars with wedge comb guides
  • 1 divider board
  • Stainless steel screws
  • Assembly Instructions

Tools required

  • Drill or screwdriver with Phillips head bit
  • Approximate assembly time: 15 minutes

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Customer Reviews
5.0 Based on 8 Reviews
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Filter Reviews:
    Anne F.
    Well Designed and Made

    We finally got bees into our top bar this Spring (I have 30 Langstroth hives). I am impressed with the quality and design of this hive, and especially the fact that the top bar length is interchangeable with a Langstroth so that I can start top bars in a Langstroth hive or transfer a top bar nuc in a 19” box if needed. Only notes are (1) the hinge needs to be more robust as the screws are working loose and (2) the bees like to congregate under the lid along the outer edge of the top bars, where they are at risk of getting crushed when the hive is opened, so I need to heavy smoke to move them. Pulling the cover in toward the bars means more stress on the hinge. Overall, a very well made product, and I’ll be interested to see how they winter.

    Rececca N.
    United States
    Top Bar Nuc

    Beautifully made and went together very nicely! This will be great for the next water meter we clean out!

    Anne B.
    My Nucleus Box is great.

    My Nucleus Box is great. However, in a more recent order, I received a Bee Brush which broke the first time I tapped it on the side of the beehive. Please advise! Thank you. Anne

    Debra R.


    Ann P.
    nice, well made box, looking

    nice, well made box, looking forward to starting some nucs