The Commander by Project Source 20x48x72, 5-tier ventilated shelf is designed to handle your toughest storage needs. The ventilated plastic is durable, easy to clean, mold resistant and made from recycled material. Each shelf has a 200lb weight capacity when evenly distributed to hold most of your storage items. Provided wall mounting brackets help keep the unit stable when loaded with weight. The 4 adjustable feet help prevent tipping when placed on uneven surfaces. This 20x48 5-T Commander by Project Source shelf is ideal for organizing your garage, shed, or workspace whether loose items or stored in your Commander by Project Source totes.