Archival Shelving is specifically designed to hold archival storage boxes. Maximum capacity is eighty 12" x 15" x 10" boxes (sold separately). Shelves adjust in 1" increments. The heavy-gauge steel frame with a powder-coat finish easily locks together without tools. Warp-free particleboard shelves provide maximum strength to support heavy loads and supports up to 900 lb. per shelf. Archival shelving supports an overall 2,500 lb. (evenly distributed). Must order both shelving and steel frame forcomplete unit.