▻PU/genuine leather options ▻High density molded foam ▻Aluminium arm/2D adjustable arm options ▻Synchronized mechanism with 4 locking positions ▻Adjusting Angle of high back 95~115°，low back 95°~115° ▻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 square chrome base ▻High back:width 630MM,seat depth 490MM,seat height450-550MM,total 1180-1280MM Low back:width 630mm, seat depth 490MM,seat height 450-550MM,total 990-1090MM Visitor:width 540MM,seat depth 490MM, total height 1010MM ▻High back chair package：1pcs/2ctn，0.222pcs, G.W：26kg/pcs Low back chair package：1pcs/2ctn，0.222cs, G.W：24kg/pcs Visitor chair package：2pcs/ctn，0.163/pcs, G.W：17kg/pcs