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Type 1 polystyrene queen fertilization nucleus (The nucleus). Constructed of high-density polystyrene. In the front part there is a kind of sliding piece that regulates ventilation with the possibility of opening and closing the exit of the bees to the outside. The bottom has another piece of plastic that can be removed when you want to fill the nucleus with bees or when you want to introduce a fertilized queen into an orphan hive. A queen excluder in the food chamber (with plenty of space) ensures that bees do not build in this space. Contains 3 plastic slats or frames to install the stamped wax. Spout with gate closure and vents, one at the bottom and one at the front. Supplied per unit and in boxes of 10 units.