bee and drones can only pass through the upper pipe of the anti-escape frame. A one-way valve is set in the pipeline, and bee and drone cannot go back out. bees and drones enter the storage box through pipes [the worker bees in the storage box can enter and exit freely/can hold about 800 bees, if the worker bees cannot fit in, they clump together and hang outside the storage box]. If bee cannot get out of the storage box, the colony cannot escape. After the bee colony is separated, remove the storage box and put it in the prepared empty box [it is recommended to find bee and use the cage to imprison bee to prevent it from escaping again]. Description Product Name:Automatic Bee Divider Function: Divide bee , Prevent escaping bees;remove male bee. Color: Gray Size:As Shown Material:Plastic Package Contents:1 Pc Automatic Bee Divider Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.