High quality: The marking bottle is made of high quality plastic, which is healthy and non-toxic, sturdy 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 easily. Using the bee marker pen: open the door of the queen bee pen grid, make sure the plunger is away from the door, put the device on the queen, then slowly close the door to capture the queen . Simple operation: This device is easy to operate, 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 queen marking. 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.