Specification: Material: Acrylic Size: 20*11.5*21cm Weight: 421g Color: transparent Packing List: 1 * Window Bird Feeder High Quality Shell: Made of high quality transparent acrylic material that contains UV stabilizers that improve clarity over time preserve time and prevent yellowing; Weatherproof design works well in various weather conditions Extendable Feeder Tray: Designed with a detachable feeder tray, which makes it easy and convenient for you to clean the bird feeder and refill the feeder with fresh seed without removing the entire feeder. Simply pull out the tray, fill it and slide it back in. Powerful Suction Cups: The powerful suction cups provide a secure and strong grip on your window to stay in place even in extreme weather; it is also easy to install on transparent windows or remove in other places MOLD FREE SYSTEM: The bird feeder is designed with drainage holes to keep your bird seed dry to prevent mold. Both the removable bowl and main feeder have drainage holes, so your bird seed will stay dry come rain or snow. Perfect Gift: Enjoy excellent clarity and an unobstructed view of your bird neighbors from your home. A great way for you and your family to see wild birds up close from your living room, den, or bedroom