The sturdy five-star base made of premium metal cansupport a maximum weight of 500 lbs. This is a comfortable office chair for big people. This big and tall office chair has 6 massage points and 8 vibration modes to choose from. The vibrating back area and thickened lumber support can alleviate your back pain at work. 15-minute easy assembly with all tools included. Comes with an illustrated instruction and some parts pre-assembled. Any problem, drop an email at [email protected], our professional customer service team will help within 24h.