▻PU/genuine leather options ▻High density foam ▻Synchronized mechanism with 4 locking positions ▻Adjusting Angle of high back 97~111°，low back 93°~107° ▻SGS certified gas lift,grade 3 ▻¢700MM aluminium base weight capacity 1134KGS，ANSI BIFMA standard ▻2.5 inch SGS certified PU caster，98,000 times no damage ▻Visitor chair：high density foam，2.0MM thickness round chrome base ▻High back:width 790MM,seat depth 510MM,seat height 460-540MM,total 1210-1290MM Low back:width 770mm, seat depth 530MM,seat height 460-540MM,total1030-1110MM Visitor:width 770MM,seat depth 530MM, total height 1020MM ▻High back chair package：1pcs/2ctn，0.382pcs, G.W：27kg/pcs Low back chair package：1pcs/2ctn，0.312cs, G.W：26kg/pcs Visitor chair package：2pcs/ctn，0.3m3/pcs, G.W：19kg/pcs