You can also put the drawer to the top shelf to add one more shelving for organizing stuffs Unique 4+1 Shelf Design: Unique 4 stackable file trays and 1 extra sorter, keep your desk organized in a different new way. With and Wihout this Organizer Decent for Desk. Sturdy construction Ideal for managing all kinds of letter size letters, paper, books, bills, mail forms, catalog sheets, paper, literature, magazines ,etc. The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. What makes our products unique? There are only two factors for us to win: 1. Standard quality 2. Highly cost-effective products. Do the trays/shelves pull out? The trays can be pull out completely, and you can choose to place them on the top shelf or desktop in your need. Can it hold letter size papers? Sure, it is about 2.4 inch for each tray to hold letter size papers. Can you put heavy text books on this? The letter tray organizer is made of lightweight mesh metal,sturdy construction is ideal for managing heavry text books. What is size of each tray? 12 3/4"w x 9"d x 13 3/4"h