supply of executive revolving chairexecutive revolving chair,executive revolving chair for officer:fix gas lift and base,adjustable & flexible head rest (press the button on the headrest dlot & then slide in the headrest twin guide in the slot & release the button) adjustable lumbar support,seat slide lever & recline lock lever,seat height adjustment lever &3 w ay adjustable arms,ergonomics with single lock synchro mechanism, to a multilock with an optional seat sl ider chair backs with upholstered with a cool, breezy mesh, a soft, comfortable fabric,mechanism: multilock mechanism & self calibrating multiblock mechanism base: metal blackbase, fabric colour black mesh ,speci fications : weight:high back- 19.5 kg,medium back- 18.4 kg,seat:depth- 51 cm,width- 62 cm,dimensions: width- 62 cm,depth- 66 cm,minimum height- 113 cm,maximum height- 123 cm minimum seat height- 57.5 cm,maximum seat height- 62 cm,width (arm to arm)- 62 cm,arm rest height- 18.5- 26.5cm ]