8.5x11 Demo Book: Includes 1 pack of demo books and 30 top-loaded plastic cases, suitable for letters of 8.5x11 inches or smaller.High transparency: Our presentation book is equipped with a crystal-clear PP sheet protective film, providing complete transparency for examination and organization. When opening the bound bed sheet protective film, lay it flat to free your hands.Long-term protection: File manager binder with a plastic sleeve of file quality. Acid-free and PVC-free. Rest assured to keep your souvenirs.Multi-functional: Document binder, diploma, birth certificate, family tree, photo binder, template, art portfolio, award certificate, modeling portfolio, art exhibition book, office binder.High quality: The lightweight and durable bed sheet pockets do not glare, do not shift, do not spray ink, are moisture-proof and easy to clean. It can provide long-term storage protection for your documents or artworks.