Way Basics Eco 3 Shelf Triplet Bookcase and Storage Shelf, Espresso (made from sustainable non-toxic zBoard paperboard) LIFETIME WARRANTY. Happiness with product and service promised by our CEO and Founder jimmy@waybasics.com Made with durable zBoard recycled paperboard, eco friendly, non-toxic and free of formaldehyde & 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 Maximum load per Cube 30 lbs (recommended); Must be used right side up as shown Dimensions (inches): Exterior 11.2 Depth x 22.8 Width x 44.8 Height and Interior Each Compartment 10.4 Depth x 21.3 Width x 13.9