1. Fabric: High quality special mesh 2. Armrest: PA reinforced nylon bracket+PU polyurethane armrest surface 3. Back frame: PA reinforced nylon, with sun dried texture on the surface 4. Chassis: Zhongtai 727 wire controlled chassis, 4th gear locked, surface baked black paint 5. Air rod: 65 countersunk 5cm black rod air pressure rod 6. Chair legs: PA reinforced nylon five-star legs 7. Chair wheel: PA reinforced nylon/surface PU scratch resistant coating Exterior design elements: The Eiffel Tower in Paris has a long history and was created with reference to its beautiful and simple shape. Adaptive 3D waist and back system with a false double back design, the backrest can be adjusted left and right, and the height of the lumbar support can be automatically adjusted Special foot pedal for telescopic foot pedal, front and back adjustment, easy to turn the pedal