▻ANSI BIFMA Quality verification standard ▻nylon+fiber plastic back frame in black color ▻Adjustable headrest,activity range:75MM ▻With adjustable lumbar,rotate the knob to make loose or tight ▻Mesh back ,fabric seat ▻4D adjustable arm,7 grades,black soft PU armrest top ▻high density molded foam ,with black PP seat cover ▻Synchronized mechanism ,3 locking positions ▻Back angle :105~130° ▻Class 3 SGS certified gas lift 100MM ▻¢700MM 5 star aluminium base bearing 1134KGS ▻2.5 inch PU caster SGS certified ,at least 98,000 times friction
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