Design your own bookcase with this cube unit. Arriving as one single cube, you can use it alone, or combine it with more cubes to form a larger bookcase. This cube can also be mounted to a wall to create a floating shelf. This unit can be used in any dry area; not meant for use in the bathroom and other wet and moist areas. Features Combine with multiple, modular units and customize to meet your needs or space Free of formaldehyde and VOC Easy to assemble, no tools required, just Peel the 3M adhesive strips and put together with easy-align pins; 3M industrial adhesive securely builds unit Must be used right side up as shown Max load capacity 50 lbs (recommended) Product Details Frame Material: zBoard Paperboard Shelf Material: zBoard Paperboard Adult Assembly Required: Yes Stackable: Yes