Check the listing for details. JCS Wildlife Recycled Poly Lumber Barred Owl Nesting Box (Gray). Condition: New. Listed at 190.96 USD. The 7-inch entrance hole of the JCs Wildlife Barred Owl Box allows for easy access in and out for Barred Owls. Additionally, this Barred Owl Box is designed as one room, which allows the owls to easily nest inside. This nesting box is also designed with an overhanging roof that reaches 2 inches over the front of the box, which allows additional protection from the elements for your owls. Special "grip" grooves on the outer front section of the box underneath the entrance hole help the adult owl gain access to the box. No perches exist outside of the box as they could provide convenient perches for predators or for young owlets, thus exposing them to predators. A door on the side of the box allows for easy access to the interior - making clean out a simple and quick task. All you would need.