I put this drafting chair together within less than 30 minutes, but was disappointed that it didn't reach the height I needed. I had a black cylindrical piece that was "extra" because it wasn't mentioned in the directions. I knew it had to be part of the chair, but had trouble figuring out where to put it. Some days later when I returned to the problem of my chair that didn't elevate as much as I wanted, I looked at the picture and realized that the black, metal cylinder piece fits directly into the 5 legged base and the rest of the chair goes on top of it. Strange that this detail was not mentioned in the instructions, but something gets lost in translation between here and China. Anyway, I'm happy with the chair and it functions as expected. Thanks, Overstock!
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