Features: Bionic segmented spine-fitted backrest, highly fitted to the curve of your spine D28 High-density rebound sponge, made of environmentally friendly materials, with strong rebound, skin-friendly and breathable 8cm height adjustable armrests, with PU surface Elastic mesh, breathable, wear-resistant and dirt-resistant Headrest adjustment4cm height adjustment 90-125backrest tilting Electroplated steel five-star feethydrostatic bearing 800kg Silent and smooth PU wheels, wear-resistance 360 rotation, free height adjustment, universal casters Specifications: - Seat width50cm Seat depth50cm Minimum seat height with the pneumatic rod at lowest position43cm Maximum seat height with the pneumatic rod at highest position50cm Backrest height47cm G.W.:13.8kg N.W.:12.3kg Product size:630*570*1120-1200mm Carton size:58.5*30*64.5cm