▻PU/genuine leather options ▻High density foam ▻Synchronized mechanism with 4 locking positions ▻Adjusting Angle of back 93°~119° ▻SGS certified gas lift,grade 3 ▻¢700MM aluminium base weight capacity 1134KGS，ANSI BIFMA standard ▻2.5inch SGS certified PU caster，98,000 times no damage ▻High back:width 770MM,seat depth 490MM,seat height 450-530MM,total 1250-1330MM Low back:width 770mm, seat depth 490MM,seat height 4450-530MM,total 1250-1330MM ▻High back chair package：1pcs/2ctn，0.304m3/pcs, G.W：31/pcs Low back chair package：1pcs/2ctn，0.259m3/pcs, G.W：29kg/pcs