Displays2go Window Sign Holder with Suction Cup Mount, 8.5" x 5.5", Set of 2, Double Sided (GWM8555) Comes as a pack of 2 units Suction cups adhere to any non-porous surface including windows, mirrors, and glass. Double sided design maximizes advertising space. Images load from the top or side for quick installation. Displays2go SKU#: GWM8555