Unobtrusive, break-resistant crystal-clear plastic racks blend into any office environment. Each pocket holds up to 1 7/8in of material. All units are single-piece racks that require no assembly. Wall mounting hardware is included. GREENGUARD certified – certified for low chemical emissions: UL.COM/GG – UL 2818. Ranked in two tiers: Certified and Gold. 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.