This is a sleep cover for small animals and birds. It has a lining, so while it's not 100%, it should provide a significant amount of light遮光. To help your cute pets sleep soundly! How about it? This is a handmade item. It is not a perfect product like a mass-produced item. Returns and claims are not accepted after purchase, so please confirm the size before purchasing. Width: 48.5 cm Depth: 48.5 cm Height: 57.5 cm Lined. It should fit a HOEI 465 cockatiel cage. Thank you. #smallanimals #birdcagecover #sleepcover #pet supplies #cagecover #HOEI465