Ergonomic Leather Chair High Back with Adjustable Lumbar Support High back bonded leather ergonomic office chair with perfect built-in adjustable lumbar support and extra thick padded seat cushion and headrest provides the ultimate comfort, the controlled lumbar knob that allows you to increase and decrease the pressure provided to your back Simple pneumatic controls let you raise or lower your seat and rock back in your chair.Pulling out on the control handle, which allows your chair to tilt back, or sit forward and push the control handle in to prevent it from tilting Waterfall seat edge for lessened pressure on the back of the legs intended to increase leg circulation and reduce fatigue Heavy duty nylon base and dual wheel casters giving great stability Weight capacity: 250 pounds. We provide component-exchange in two years