These entrance hole plates prevent predators such as squirrels and woodpeckers from enlarging the entrance hole of your nest boxes to gain access to the birds inside. Plates are made from steel and have rounded corners. They can easily be attached to your wooden nestbox using the four screws provided. Available in four sizes with a choice of 25mm, 28mm, 32mm and 45mm entrance diameter.
Choose between a single plate or pack of ten.