I'm waiting for the seller's answer, but this is unlikely to help. Technical support is also silent, although it’s not even possible to submit a request through the site. I believe that the exchange will be unrealistic. Based on the reviews here. From the very beginning of the assembly, I was surprised at how large the gap between the free mount for the backrest and the one at the lever. He unscrewed the bolt and he just shot under the force of thrust when he weakened. Since you have to force this mount. I feel this chair for a long time and will not last, although it showed promise.
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