Frame Information: These are not conventional picture frames. The frames are a flexible PVC material. The frames open and close with magnets, allowing the ad to be removed or replaced easily. However, the frames do not attach to the wall or surface with magnets: they can be attached by using the included peel-off adhesive backing to any smooth surface, or they could be attached with standard methods such as poster strips/tape, mounting putty, or by a simple nail through the top of the frame. There is no glass in the frame - only safe, light-weight PVC material. Please see the 5 pics (above) along with the ad for more frame details.