One way mirror film lets you seed birds--and they can t see you. Cardinal classic feeder lets you offer your favorite seed. Cardinals and chickadees alike can t resist this open-concept feeder. Durable clear plastic feeder is easy to use, simple to hang, quick to fill and clean. Two heavy-duty suction cups provide strong grip to any window. Dimensions are 5.6 X 4 X 12.1 UPC Code = 742933742052