... 18, 24, 30,36, 42, 48, 60, and 72 inches deep. These wire metal shelf have openings ... holes on the corners where the poles insert and little plastic clips connect the shelving together. The ... shelves can be put at any height and moved up and down when the unit is fully assembled without ... ability to stay clean and resist rust and mold. It's also used by retailers and in industrial applications. It ...