Increased wire thickness and shelf clips for improved strength and tighter fit, more weight capacity is satisfied E-coated for rust protection and longer using life for outdoor and indoor use Free standing unit with 4 shelves fitting in tunnel greenhouse or on ground alone Simple and easy push fit assembly- no tools required, 10 minutes approximately assemble time Each layer has maximum 33lbs weight capacity, stronger, more weight capacity H: 42 In x W: 35 In x D: 12 In Sturdy reinforced shelving system designed for your garden or greenhouse