High density rebound sponge, made of environmentally friendly materials, with strong rebound, skin friendly and breathable Double layer sponge wrapping with high quality PU leather, providing strong wear resistance, high elasticity and good touch Linkage armrests PU soft package surface support 90 135 backrest tilting One piece adjustable footrest , with a maximum extension of 40cm Electroplated steel five star feet hydrostatic bearing 800kg Silent and smooth PU wheels, wear resistance 360 rotation, free height adjustment, universal casters Seat width 52cm Seat depth 50cm Minimum seat height with the gas rod at lowest position 42cm Maximum seat height with the gas rod at highest position 54cm Backrest height 80cm