Love this bookcase, but the box wasn't taped very well, so that the crossbar fell out during shipping, and Wayfair didn't have a replacement, so they just shipped me an entire new bookcase in order to provide a replacement crossbar.   That seems like "overkill" to me...........they should have a "parts" dept. so that these wasteful situations can be avoided.......but anyway........I got my missing crossbar for the back of my unit replaced.   It  just ended up costing Wayfair 2 entire units, which I thought was wasteful.  :(  I still love my bookcase, though, very functional, just the right size for my kitchen, and very sturdy!!!