This type has no pillars in the front, sides, or middle. It offers good visibility and features a high frame to prevent food from scattering. I think it's perfect for daily bird watching. We've designed it to be attached by wrapping a string around the roof and tying it in the back. If you would like a "through-hole" in the back panel, please let us know and we will accommodate your request. Height: 28cm Width: 17cm Depth: 17cm If you place an order, we will ship it via Rakuraku Mercari Delivery.