Product Description The ergonomic mesh office chair has a durable breathable mesh backrest that allows air to circulate and keep you cool when you lean. The soft and moderate sponge pad can adapt to the sitting position of the human thigh for a long time, with full shape, good elasticity and no deformation, which can provide you with a comfortable seat. The computer chair with standard Classic-3 gas lift is safer through SGS and BIFMA! The sturdy rotating universal wheel and chair can rotate 360 degrees, making it more flexible on the workstation. Perfect packaging: computer desk chair packaging includes all accessories, high-strength packaging can protect all accessories from damage Product Size Overall dimension: 18.5 in. W x 16.9 in. D x 36.8 in.-39.8 in. H Seat size:18.5 in. W x 16.9 in. D Backrest size: 18.5 in. W x 19.3 in. H Height from ground to seat: 17.1 in. -20.2in. Weight capacity 250 lbs. What's in the Box 1 office chair 1 Set of assembly tools 1 User manual Notes We strongly recommend reading the user manual before starting to assemble. Assembly tools are included.