The Modular Cubes Plus set takes a perfect storage idea and gives it just a little more space. With just a little more height per cube, you'll get a little extra headroom to organize your books or records, whatever you decide to store! By design the cube is modular and modern, built to fit into your existing design with ease. To assemble zBoard storage products, simply peel, stick, done! Tool-free and hardware free. Super strong 3M heavy duty adhesive bonds the boards together. All our products are formaldehyde free and VOC free so it's safe for your family and our environment. Must be used right side up as shown.