A year later, the gas lift stopped working on 5 of the 6 chairs purchased. On two, the attachment to the harness from below burst and it was impossible to sit on two chairs, they were twisted. I don’t know if they are suitable for workers no more than 50-60 kg in weight, I don’t recommend them to others.

For a person with a height of 172 cm, the shoulder blades have support on the back, but I would like the back to be a little higher

Bought for a girl, that's it. Height, handles - everything is calculated. For people above 180 cm and weighing more than 80 kg - not suitable. It will be fragile and push the seat to the bolts. Downgraded by two stars only because of the package. Otherwise, I recommend to buy.