Flexible design can be set up as a 5-shelf, 72in high unit or a 36in high workbench! Unique construction requires no nuts, bolts or tools. Assembles easily in minutes. Supports up to 800 lbs per shelf. GREENGUARD certified – certified for low chemical emissions: UL.COM/GG – UL 2818. Ranked in two tiers: Certified and Gold. This product is heavy and/or oversized and may need more than one person to handle. Less harsh chemicals – made with fewer harsh chemicals, or safer chemicals than typical alternatives, helping reduce your use of and exposure to substances that may be more harmful to your health and the environment.