I wouldn't recommend this chair for the amount of money it costs. Not a great chair much overpriced for the lack of ability to meet the reason I bought it. Should cost at least half if not more of what it actually did. The lumbar support adjustment mechanism is very poorly constructed. It slips every few minutes and doesn't hold in place making it a super pain to have to readjust continuously. The price for this chair is robbery considering it's supposed purpose. Now I'm stuck with a chair that doesn't meet my needs and can't afford one that would.
Due to the bolt location under the seat it takes a while to line up and tighten bolts that attach the back to the seat. Otherwise the chair has what I need for good lumbar support. I replaced the plastic wheels with rubber chair casters made for hardwood floors and carpet. Ron M