Giantex Big and Tall Office Chair 400lbs, Heavy Duty Ergonomic Mesh Chair with Adjustable Lumbar and 3D Headrest[400 LBS load bearing Capacity]: This big and tall chair features a heavy duty metal base and an durable gas lift, which is stable enough to bear big and taller people up to 400 LBS. Plus, the wide seat surface with 20" width offers comfortable sitting experience. [Personalized Sitting Experience]: Customize your sitting experience with the sturdy class 3 gas lift that allows for 4" height adjustment. Moreover, with the 3" up and down adjustment ,