ADDENDUM:
Long I have it now postponed but for these goods again I call my 3 star rating! It has not even lasted half a year up on the seat surface burst open the synthetic leather. I have the chair now two years about, if not longer, and the reference is to the seat nothing left, even for a budget model that is a nogo! after more than a year much the whole chair apart, when I looked around for a long time for a chair whose frame is made entirely (except for paneling) made of metal, I found this model and to the extent true, the decision also right and good because the whole plastic chairs not even a year no matter how much money you make for lying. The capacity specified by the manufacturer with a true reason to buy as withstand more than a few chairs 90-110 kilo .... The lower this limit is the less stable the chair in the reverse is also built and how many people there are to reach the 90-110 kilos? Anyway after a year were the 4 Allen screws directly under the seat (not on the rack on the seat but the first) literally from the thread leveraged as the thread is simply not long enough exercise or the screws were not gesichtert against loosening, the problem here is to exactly this point a high leverage on the screw acts or by any get up and sit down the screws downright through the motion be unscrewed. Consequence are refracted at the crossbar true that the plastic parts .... unless the damage. The plastic parts I have because they do not protect important for the function and the screws tightened away .... I recommend each of these should also be examined as always otherwise one is the chair have even greater harm to be feared on the chair. Tighten until no longer there, they dissolve quickly else goes.
But what I think is much worse is the lack loving the leather .... I can only recommend ... Stay away and only test especially in business and check their paces, when it comes to chairs much is obvious gefuscht. The chair is his money all the time and not worth cost in fiscal 220-250 euros at the time.