Displays2go 5.5" x 8.5" Window Sign Frames, Double Sided, Set of 2, Black Plastic (WS5585BLK) Plastic lenses are held in place with magnets Invisible adhesive dots attach frame to glass doors or windows Displays (2) 55 x 85-inch signs back-to-back Double-sided viewing is perfect for a window-based presentation Displays2go SKU#: WS5585BLK