Mesh material; Foam density (back:12, seat:24); 300mm Nylon base(850kgs weight bearing); Nylon castor; 120mm black gas lift. One lever, T2.0mm seat plate. PP arms Sizes: OVERALL SIZE(cm): W56 X D60 XH84-96 BACK CUSHION SIZE(cm):H39 X 41W X TH0 SEAT CUSHION SIZE(cm): D 45X W 46X TH 5