Shelves and Steel Pack sold and shipped separatelyBoth are required for assemblyORDER BOTH.Offers trouble-free storage and retrieval of inactive files.Heavy-gauge, powder-coated gray steel frame easily locks together without tools.Warp-free particleboard shelves provide maximum strength to support up to 900 lbs. each (evenly distributed).Designed to hold up to 80 letter/legal archival storage boxes (12w x 15d x 10h), sold separately.Shelves adjust in 1" increments.