High quality: The marking bottle is made of high quality plastic, healthy and non-toxic, strong and durable. The marker is made of special materials, so you can recognize the queen bee even at night. Exquisite craftsmanship: fine workmanship, smooth and round surface without burrs, safe to use, will not hurt the skin, and This device is small and can help you capture and mark the queen bee easily. Using the bee marker pen: open the grid door of the queen bee pen, make sure the piston is away from the door, place the device on the queen, then slowly close the door to capture the queen. Simple operation: this device is easy to use, press the plunger and gently push the sponge plunger of the queen bee marking bottle on the grid to hold the queen in place when marking the queen. Marking Catcher: This one-handed bee catcher can easily mark your queen. When you mark them, it is used to capture and hold queens. It is a good tool for beekeepers.