Decorate your home, store, salon, or office with the 7Penn 6 Pack Invisible Shelves Floating Shelves for Book Display. 15-inch long acrylic bookshelf ledges can be mounted with included hardware to your walls. Use these mounted book holder ledges as craft room shelves, bedroom shelf book racks, acrylic wall organizers, comic book shelf displays, nursery shelves, picture ledge shelves, or toy invisible shelf ledges to store your picture and fiction books, manga and comics, family photos, room decor, small toys, nail polishes, lipsticks, and other small objects. 1.6-inch narrow wall shelf ledges hold your items, while the 2-inch tall clear walls keep your displayed items securely in place. Warning: This product can expose you to chemicals which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm.