Museum Collection Plein Aire 3.5 Wide open back closed corner frames hand-finished and leafed by expert craftsmen. Heavy， quality wood， with closed， seamless corners reinforced from the back. The detailed process to create this frame is a trade secret passed down for generations， and each frame is as individual as your art--and as timeless. Please note， these frames are designed for stretched canvas paintings and do not include glass or backing. However， glass and backing may work with these frames if necessary and would be a separate purchase. Mounting the stretched canvas art will need hardware such as offset clips to attach painting to the frame. Hanging hardware for hanging the frame on the wall is included (screws， D-rings， and wire).