The Industrial Add-On Unit is an extra strength, welded wire construction storage shelf. The open wire shelves are perfect for office storage, promotes air circulation and reduces dust accumulation. The storage shelf is furnished with wire shelves that adjust in 1 increments, and includes four steel shelves, four posts and snap-together clips. Series Name: Safco® Industrial Wire Shelving; Shelf Type(s): Adjustable; Shelf Depth: 24"; Shelf Capacity (Weight): 800 lbs.