Archival Shelving is specifically designed to hold archival storage boxes. Maximum capacity is eighty 12" x 15" x 10" boxes (sold separately). Warp-free particleboard shelves provide maximum strength to support heavy loads. Shelves adjust in 1" increments. The heavy-gauge steel frame (sold separately) with a powder-coat finish easily locks together without tools. Archival shelving supports an overall 2,500 lb. (evenly distributed) and 900 lb. per shelf. You must order both shelving and steel frame (SAF5260) for complete unit. Safco Archival Shelving Box 2 of 2 - 69" (1752.60 mm) Width x 32.9" (834.90 mm) Depth x 0.5" (12.70 mm) Height - Particleboard - Gray - 4 / Pack General Information Manufacturer: Safco ProductsManufacturer Part Number: 5261Manufacturer Website Address: http://www.safcoproducts.comBrand Name: SafcoProduct Name: Archival Shelving Box 2 of 2Marketing Information: Archival Shelving is specifically designed to hold archival storage boxes. Maximum capacity is eighty 12" x 15" x 10" boxes (sold separately). Warp-free particleboard shelves provide maximum strength to support heavy loads. Shelves adjust in 1" increments. The heavy-gauge steel frame (sold separately) with a powder-coat finish easily locks together without tools. Archival shelving supports an overall 2,500 lb. (evenly distributed) and 900 lb. per shelf. You must order both shelving and steel frame (SAF5260) for complete unit. Packaged Quantity: 4 / PackProduct Type: Shelf Physical Characteristics Product Color: GrayProduct Material: ParticleboardHeight: 0.5" (12.70 mm)Width: 69" (1752.60 mm)Depth: 32.9" (834.90 mm) Miscellaneous Compatibility: Steel Archival Shelving Additional Information: Shelf Adjustablity:1" increments Capacity - Overall:2500 lbs. (evenly distributed) Recycled: NoAssembly Required: YesCountry of Origin: United States Warranty Limited Warranty: LifetimeAdditional Warranty Information: Limited Lifetime Product Numbers: 073555526103