Winholt SCAS-2148-3-SU Starter Shelving Unit Kit, cantilevered tubular, (3) shelves, (1) right & (1) left upright, (2) cross braces, (1) hardware kit, 21" x 48", 1-1/2" x 1-1/2", aluminum construction, 900 lb shelf capacity, NSF (please note: split sleeves are not included with this product)