Features:Special products for beekeeping, suitable for top bar hives, Nuc's, and mating hives.Bee hive box entrance disk is used on a box where there is a round entrance hole.Rotating disc used for controlling access to the entrance of beehives.Designed to adjust the size of the tap-hole in the hive and protect the hive from the mouse attacks in autumn and winter.Four access options: Fully open, queen exclusion, closed with ventilation and fully closed.Specifications:Material: plasticColor: yellowDiameter: 6.8 cm /2.67inchPackage Included:12 x Beehive Box Entrance GatesPackage List1Special products for beekeeping, suitable for top bar hives, Nuc's, and mating hives 2Bee hive box entrance disk is used on a box where there is a round entrance hole 3Rotating disc used for controlling access to the entrance of beehives 4Designed to adjust the size of the tap-hole in the hive and protect the hive from the mouse attacks in autumn and winter 5Four access options: Fully open, queen exclusion, closed with ventilation and fully closed