Description All exposed edges hemmed to prevent injury. Ventilation holes for excellent air flow. Removable nest bottoms for easy cleaning and litter replacement. Double bolted Perches are standard. Perches facilitate birds entering the nest The Perches fold up to keep birds out of the nest if you want to do that. Standard hanger brackets. Easy to assemble. Birds per Nest: 50-60 Holes: 10 in two tiers Length: 60 inches (152.4 cm)