▻Patented product, patent number：ZL200630128590.2 ▻ ANSI BIFMA X5.1-2011 standard ▻Nylon+fiber plastic back, black/white options ▻Taiwan Mesh back, PU cover seat ▻High density foam ▻Multi-lock mechanism ▻Φ680mm chrome base capacity 1133KGS ▻ Φ2 inch PU caster SGS certified，at least 100,000 times friction ▻Package:2pcs/ctn，0.239m3/pcs, G.W：19kg/pcs