Series : O Series RECOMMENDED Weight : 90kg RECOMMENDED Height : 173cm- 183cm Size : S Chair Cover Color : Black Chair Cover Material : PU Leather Frame : Metal Base : 69cm Base Material : Nylon Five-star Base Casters : 3" Caster/PU Armrests : Height only Mechanism Type : Conventional Tilt Gas Lift Specification : SGS certified four star gaslift Gas Lift Class : 4 Adjustable Back Angle : 135° Adjustable Lumbar Support : Yes Adjustable Headrest : Yes Package Size : 34.25"L x 26.38"W x 12.60"H Net Weight (Approximate) : 44 lb / 20kg Warranty Length : 2-year for Accessories Gross Weight : 50.27 lb / 22.85kg Assembly Required : Yes Eco-conscious : Less Harsh Chemicals/REACH Certificate Meets/Exceeds ANSI/BIFMA Standards : Yes Note : Head Pillow Included