Sold as 1 Each. Breathable mesh fabric seat with ample padding; Upright locking position. Seat dimensions: 18"W x 19.5"D. Includes adjustable tilt tension control, upright locking position and pneumatic gas lift seat-height adjustment. 25" nylon base; Hooded double wheel casters. Back dimensions: 18.75"W x 16"H. Weight rated up to 275 pounds. Adjustable tilt tension control; Pneumatic gas lift seat height adjustment. Features solid metal back frame with a ballistic nylon wrap. Assembly Required. Overall dimensions: 34.5"H x 25"W x 25"D. Mesh fabric seat offers generous padding for comfort. Manufacturer's 6-year limited warranty.