Rarely am I defeated in the face of flat pack. But these so-called shelves defeated me hands down. They are not the items in the picture for a start, and when they arrive there are no instructions. What you have is a set of tubes and a set of shelves. It's reasonably obvious what goes where, but then the fun really starts.
The shelves do not have holes large enough for said poles, or if they do, they are too large
The shelves are too brittle and one came broken already
Once jammed into position, they cannot be taken apart
It is impossible to get them level and standing upright
I tried one, thought it was faulty, tried a second one and gave up. They are currently waiting to go back to the company.
And they are NOT at all the items shown in the picture. Beware and do not bother with these frustrating time-stealers!