The 4-tier foldable shelves is easy to set up without tools. Unfold all shelves except the top 2. Cover the top shelf 3. Fasten the triangle buckle. Up to 880lbs Weight Loading? The collapsible shelves is made of high quality carbon steel materials, the maximum weight of per shelf can reach up to 220lbs (100kgs), it is very sturdy and durable. You can make your place orderly and clean by storing your stuff on the storage shelves. When not in use, you can also fold the storage shelf and put it under bed or in the corner. Rolling & Detachable Wheels? You can move your the folding shelves easily. Two of the wheels feature smart-locking function. We offer two colors (Black/ White) and three Size (3-tier / 4-Tier/ 5-Tier) available. You can make our folding shelf a good gift for your relatives and family. QUALITY ASSURANCE: If you are not satisfied with our foldable storage rack, please feel free to contact with us and we won’t let you suffer any loss.