Infinitely adjustable seat height with top lift. This model bears the GS mark from LGA Nürnberg and meets all safety requirements for office and commercial use. The backrest features an integrated, height-adjustable lumbar support, including a coat hook. An aluminum bracket connects the seat and backrest. Comfortable contoured seat with knee roll. Body-Balance-Tec joint in the seat surface. Point-synchronous mechanism, with spring tension individually adjustable to body weight. Includes K2 armrests with soft pad cover (height and radial adjustable, width adjustable via screws). Elegantly designed and stable polished aluminum base. Maximum user height: 1.90 m. This item is delivered disassembled. Assembly can be completed in a few simple steps. No assembly is required for gas springs, chair casters, footrests, etc.