Mid-Back Pc Swivel Lumbar Support Adjustable Desk Task Computer Ergonomic "FDW chairs, through its pursuit of excellence and continuous efforts, have added the element of ""health"" to the traditional ""sitting culture"" vigorously promoting ""a healthy sitting culture"" and hope that people can maintain the passion of life every day as well as creating vitality. SPECIFICATION: Color: Grey Material: Mesh Adjustable Seat height: 17.5?-20.5? Maximum Weight Capacity: 250 LBS Product Details: Ergonomic backrest with lumbar support breathable padded seat 360 degrees rotation smooth-rolling casters Height adjustment handle What?s in the package? FDW office chair x1 Tools for assembly x1 User manual x1 Multi-USE CHAIR: Office Chair/ Desk Chair / Computer Chair / Task Chair / Ergonomic Chair / Swivel Chair Notes: We strongly recommend reading the user manual before assembly. Assemble tools are included." ?Easy To Assemble - We provide all the tools and the detailed instructions for you. No additional tools needed for assembly. It is easy to assemble this office chair by yourself at home. ?Swivel Casters - The chair can swivel 360 degrees. The casters are suitable for hard floors, carpet floors and more, swivel without noise and won't scratch the floor. ?Supportive Backrest - The open mesh design creates a breathable, well-ventilated backrest, yet with it?s resilient mesh, the back moulds to your back providing a more supportive seat, which helps align the spine and reduce pressure and muscle fatigue. ?Multifunction Mechanism - pneumatic controls make it easier to raise or lower the Seat. The rocking mode can relax you from heavy work, pull out the handle to start rocking and pull it in to stop. This chair can support up to 250lbs. ?Rest Assured to Purchase - We have a professional customer service team, so if you have any questions, please do not hesitate to contact us. We are always with you.