Ergonomic Mesh Computer Office Desk Midback Task Chair Metal Base Maximum Dimensions: 16.7 inches W x 21.7 inches D x 35.6 -40.4 inches H Seat Width:16.7 inches Seat Depth: 16.3 inches Seat Height: 18.3 inch - 23 inches Back Width: 15.6 inches Back Height: 17.7 inches Height adjustable from 35.6" to 40.4" to meet needs 360 Swivel to offer a versatile range of motion, allowing for multi-tasking convenience, the wheel casters make it easy to roll around your room or office as needed Heavy Duty solid structure with high capacity. Mesh Backrest offer great support for your back when you sit 5 star Metal base keeps the chair stable. Pneumatic seat height adjustment