JCs Wildlife Barn Owl Nesting Box Do It Yourself Assembly Kit MADE IN INDIANA: The Barn Owl box is manufactured in the USA by JCS Wildlife. Great for rodent control. NATURAL FINISH TO PROTECT FROM ELEMENTS: Outside is treated with Linseed oil to protect wood from elements. Wood is exterior grade plywood and is ready for outdoor exposure. DIMENSIONS: The entrance hole is elliptical measuring 3 and 4 1/2" with 4 grip grooves below to aid in owl entry. Dimensions: on box are 23 " long, 12 " wide, and 16 " tall (roof overhangs box by 2 in front) EASY INSTALLATION: Come pre-assembled and includes drain holes in the bottom and holes under the roof overhang allowing for air circulation. A hanging strip on the backside of the box allows for easy installation (recommended placement is 12'-20' high) TAILORED TO OWLS: Modeled after the design of owl expert Steve Simmons, this box meets the specific needs of the Barn Owl.