If space is an issue, build higher with our four-level Greenhouse Shelf Unit!• Powder-coated steel frame.• Just minutes to assemble.• Fasteners to connect two or more units together are included.• Can stand alone or be joined together for multiple units.• Dimensions: 35"W x 19"D x 54"H.• Max weight of 40 lbs. spread across shelf.• Shelves have 1-1/2" x 1-1/2" grid.