Entrance disc with drone excluder

Rotating entrance disc made of plastic / PVC - with four positions (ventilation, open, queen excluder, drone excluder) - for Kieler and Segeber mating nucs. Also suitable for home-made queen rearing nucs. Ideal for use on islands where a drone excluder is mandatory. The size of the entrance disc is: diameter 5 cm and 1-1.5 mm thick.