The multiple tiers shelves are made of selected materials, sturdy steel, and durable CARB P2-compliant MDF boards. The storage shelf features an adjustable height and dividable structure. You can change the structure according to your various needs. In addition, the surface of the racks is covered by powder coating with a smooth edge, which makes the racks rustproof and smooth enough to prevent scratches. Provide a long-term service life for you.