Way Basics Eco Stackable Modular Storage Cubes Plus (Set of 6), Espresso (made from sustainable non-toxic zBoard paperboard) 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); Must be used right side up as shown Interior Dimensions (inch): 10.7 Depth x 11.8 Width x 13.9 Height; Exterior: 11.2 x 40.2 x 30.9