Managerial mid-back chair features a breathable mesh back chair and fabric-upholstered seat. Mesh upholstery is made of high-strength elastic nylon. Ergonomically designed mid-back matches the natural curvature of a person''s back. Arms adjust in height (25" to 28-7/10") and in width (24" to 26"). Functions include pneumatic seat-height adjustment (17-7/10" to 21" high from the floor), 360-degree swivel and swivel tilt mechanism. Black frame has five-star, reinforced nylon base (25" diameter) with casters for easy mobility. Seat size is 20" wide x 18-7/10" depth. Back measures 20" wide (at the widest portion) x 19-7/10" high. Weight capacity is 250 lb. Chair meets the CA117 fire-retardant standard.Back Width: 20"Base Material: NylonDepth: 23.5"Frame Color: BlackHeight: 40.5"Maximum Load Capacity: 250 lbSeat Depth: 18.70"Seat Material: FabricSeat Width: 20"Width: 25.3"Seat Color: BlackPackaged Quantity: 1 EachProduct Type: ChairAssembly Required: YesCountry of Origin: TaiwanNumber of Casters: 5Adjustable Arm: YesAdjustable Seat: YesArm Height: 28.70"Arm Width: 26"Back Height: 19.70"Base Shape: 5-starChair/Seat Type: Management ChairMaximum Seat Height: 21Minimum Seat Height: 17.70Back Color: Black