I think this shelving unit is a piece of junk and I'm returning the two that I purchased.  This unit does This set of shelving does not contain the tradition size poles.  The poles on this unit are half the size of poles that comprise every other unit I have ever purchased or worked with professionally.  The wire shelves are not meant to handle any significant weight.  They feel cheap and flimsy.  I was very disappointed as I have been looking for this size shelving for a long time.