The unit is fabricated of sub-standard material (particle board covered in black veneer). I would not put anything of any weight whatsoever on the shelves. I do not believe the photo of the shelf on the website being able to hold 4 hardcover books on a single shelf. No way. A couple of the corners were a bit crushed as if they had been  leaned/lightly dropped on a hard surface, despite the packaging being more or less intact.  The styrofoam being used was the super cheap styro that crumbles and is very prone to static, so it goes everywhere. clings to everything, and is very hard to clean up.  This shelf is OK, but definitely not worth what I paid for it. It is a shame as my prior Wayfair purchase was very good. Caveat Emptor.