Prevue pet products cocktiel nest box 1104 solid hardwood nest boxes with an indented bottom center to prevent egg rolling. Top opening for easy cleaning and removal of bedding materials. Box measures 9 inch long, 10 5/8 inch wide, and 11 inch high. Warnings: inspect the product periodically and remove from use if it becomes worn or damaged. Cleaning: wash with warm water using a damp soft cloth and mild soap. Dry thoroughly before returning it to the cage.