▻ANSI BIFMA Quality verification standard ▻nylon+fiber plastic back frame in black color, with adjustable lumbar, swing back function ▻Adjustable headrest ▻Mesh back ,fabric seat ▻2D adjustable arm,grade 6,PU soft armrest top ▻high density molded foam ▻Multi-lock mechanism,3 locking positions ▻holder between back and mechanism:chrome ▻Back angle :100°~140° ▻Class 3 SGS certified gas lift 80MM ▻¢700MM 5 star aluminium base SGS certified ,at least 98,000 times friction
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