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Yumeya places great emphasis on the safety and durability of commercial furniture, which is why our chairs are made from the highest quality materials. The frame of the chair is made of industry-leading grade 6061 aluminum, with a thickness of 2mm, and the stressed part even reaches 4mm, which is the basis of good quality. For the welding process, YY6138 uses welding machines imported from Japan to reduce human error and make the welding more tight, so the weight-bearing capacity of the chair can reach 500lbs. There is no need to worry about uniformity, all Yumeya chairs go through 10 rounds of QC by 4 departments, including strength test of ANS/BIFMA X5.4-2012 and EN16139:2013/AC:2013 level 2, to ensure that the chair has the same good appearance and quality. The chair is equipped with a support bar to further enhance the stability of the structure, even for high-frequency use in commercial settings, it has a very good durability. In addition, the chair also has stacking soft plugs to reduce the wear and tear on the frame when the chair is stacked, and the metal adjustable glides on the legs can further extend the service life of the chair while reducing the noise generated when moving.