Specification Weight : 25.5kg Head Pillow : Memory Foam Lumbar Support : Memory Foam Upholstery : PU Leather Frame : Steel Base : Aluminium Foam Type : 4D Tile Lock : High Density Cold Foam Caster : 65mm PU Coated Adjustable Backrest : Up to 145 Degree Adjustable Armrests : 4 Directions Gas Lift : Chassis 4 Explosion-Proof Gas Rod Tilt : Up to 15 Degree Tilt Lock : Yes Max Load : 120 kg Recommend Height : 165 ~ 195 cm