Y Office ChairSKU: N0818Features Adjustable Hydraulic Metal Base Tilt Locking Mechanism Adjustable Knee Tilt Tension Nylon Arm Frame Removeable Arms Breathable Mesh Upholstery 5 Caster Aluminum Base Assembly Required Dimensions Overall Dimensions: 36.5-40 inches high x 27 inches wide x 27 inches deep Seat Dimensions: 16-20 inches high x 20 inches wide x 20 inches deep Arm Dimensions: 23.5-31.5 inches high x 25.5 inches wide Pack/Carton DetailsSize (inches): 26.5 x 24.5 x 14 Box Weight (lbs): 37 Pc/Box: 1