▻ANSI BIFMAx5.1-2011 STANDARD ▻Fabric/PU/genuine leather options ▻Yellow resistance, abrasion resistance, insect resistance, hydrolysis test ▻High density foam ▻Tilting mechanism ▻SGS certified gas lift,grade 3 ▻¢680MM aluminium base weight capacity 1134KGS，ANSI BIFMA standard ▻2.5 inch SGS certified PU caster，98,000 times no damage ▻Package：2pcs/1ctn，0.133m3/pcs, G.W：25kg/pcs