450LBS Capacity - Blue Whale big and tall office chair has a thickened steel tray mechanism, a strengthened metal star base and silent PU wheels, which has excellent durability and bearing capacity. 450LB home computer chair is suitable for most office or game needs. High quality nylon frame, pure texture, strong and durable. Overall Upgrade Size - Our upgraded office chairs are equipped with super large seat cushions (21D 'X 19.5W', 5.1 'thick), tall backrests (42.1' maximum) and heavy metal bases, which are designed for tall people and can support 450 pounds. It is an excellent gift choice for yourself or the people you care about. Ergonomic and Adjustable - S-shaped backrest is equipped with an effectively adjustable lumbar support, which can switch to a comfortable sitting position at any time. Manually adjust the support plate, up and down, front and back, to meet our requirements for the office environment.