Way Basics Eco Stackable Oxford Modular Bookcase & Storage Shelf, Espresso Wood Grain IT'S NOT WOOD; IT'S BETTER - Made with durable zBoard recycled paperboard, eco friendly, non-toxic and free of formaldehyde and VOC LIFETIME GUARANTEE - Happiness with product and service promised by our CEO and founder TOOL FREE ASSEMBLY - 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 STRONG and DURABLE - Maximum load 50 lbs (recommended) for the Cube; Maximum load 30 lbs (recommended) for the Rectangle; Must be used right side up as shown Interior Dimensions (inch) Rectangl;e: 10.7 Depth x 21.3 Width x 13.9 Height; Interior Dimensions (inch) Cube Plus: 10.7 Depth x 11.8 Width x 13.9 Height