Bulk Storage Rack Add-On Unit Width 72 In. Depth 36 In. Height 72 In. Load Capacity 4500 lb. Number of Shelves 3 Capacity per Shelf 1500 lb. Beam Capacity 1500 lb. Gray Material 16 ga. Steel Decking Material Particleboard Finish Powder Coat For Use With Mfr No ERZ723672S Includes Upright