Fully assembled window feeder features sloped cover to prevent runoff of rain into dish. Constructed of UV stabilized polycarbonate, will not yellow in the sun. Open construction gives a clear view of birds on the feeder. Curved rim makes perching easier for birds. Deep dish holds 2 cups of seeds, suet, fruit or mealworms. 3 high-quality suction cups hold feeder securely to window. 7" diameter.