Super Mesh Chair with Headrest and Arms: * Thick Padded Contoured Mesh Fabric Seat and Mesh Back with Lumbar Support * Pneumatic Seat Height Adjustment * Height Adjustable Lower Lumbar Support * Tension Adjustable Lumbar Support * Locking Tilt Control Mechanism * Tilt Tension Control * Headrest * Height Adjustable Arms with Padded Armrests * Heavy Duty Nylon Base with Dual Wheel Casters * Seat Size: 20.5""W x 19.25""D * Back Size: 20""W x 25""H * Seat Height: 18"" - 22""H * Overall Dimensions: 41.9"" - 48.2""H