The open wire design of these carbon-steel shelves minimizes dust accumulation and allows a free circulation of air, greater visibility of stored items and greater light penetration. Olympic wire shelving can change as quickly as your needs change. Shelf wires run front to back, allowing you to slide items on and off shelves smoothly. Shelves can be adjusted at 1" (25mm) intervals along the entire length of the post. Green-Guard Epoxy finish with chromate substrate. Olympic Green-Guard Epoxy coated shelves and posts carry a 10-year limited warranty against rust and corrosion. NSF