Shelves are precision molded from sturdy structural foam plastic. Durable, versatile and resists dents. Shelves feature a 3″ high edge on all four sides to prevent spills and accidents. Angle legs are reinforced with gussets for torque-free extra strength. Integrated handle requires no assembly. Plate-mount casters provide durable stability. Shipped unassembled for freight savings. Assembles easily in minutes.