 High-density rebound sponge, made of environmentally friendly materials, with strong rebound, skin-friendly and breathable  Fixed elastic waist support and fixed armrests  Elastic mesh, breathable, wear-resistant and dirt-resistant  2D headrest, 4cm height adjustment, 60° tilt adjustment  90°-127° backrest tilting  nylon five-star feet，hydrostatic bearing  Silent and smooth nylon wheels, wear-resistance  360° rotation, free height adjustment, universal casters  Seat width：49cm  Seat depth：48cm  Minimum seat height with the gas rod at lowest position：39cm  Maximum seat height with the gas rod at highest position：48cm  Backrest height：48cm