Installation Tips & Customer Service: Please ensure all screws are fully tightened during assembly to prevent any wobbling. Your patience is appreciated as this bookcase includes multiple components. Upon delivery, please check all parts against the instruction manual. Versatile Layered Storage: No more worries about storage space with our tier, Each layer, 9.7" high,This open bookcase offers a flexible layout to effectively organize your space. The well-designed layer heights are perfect for storing books, collectibles, photo frames, and everyday essentials, transforming clutter into a clean and orderly display. Premium Eco-Friendly Material: Crafted from high-quality MDF board that meets international safety standards, this bookcase is both safe and stable. The natural wood grain finish is simple yet elegant, effortlessly enhancing your home decor while providing long-lasting durability. Double Reinforcement & Anti-Topple Safety: Your safety is our priority. The top is equipped with a wall-fixing iron bracket for added stability. Additionally, triangular reinforcement pieces are installed at the four corners of the backboard, combined with a mortise and tenon + H-shaped structure for enhanced load-bearing capacity. This ensures the unit remains sturdy and reliable Sturdy Construction for Daily Use: Built with a robust H-shaped structure and reinforced joints, this bookcase is designed for superior stability. The combination of quality materials and thoughtful engineering ensures it stands firm, providing a secure storage solution for your home office, living room, or bedroom.