You don’t welcome mice in your house during the winter, so why allow them in your hive. This stainless steel Mouse Guard is constructed from high quality stainless steel and is designed for a 10-frame hive. Simply place the mouse guard in the entrance of your hive to prevent unwanted mice from entering the hive. The 3/8″ holes are the right size for worker bees to enter and exit the hive and will keep the mice out. This is great to tool for winter preparation and will also assist in good ventilation throughout the winter.