Mid-back Mesh Chair offers a breathable mesh back, height-adjustable lumbar support and upholstered cushioned seat to enhance your comfort. Arms adjust in height and features soft, polyurethane arm pads. Cable-activated fingertip controls operate pneumatic seat-height adjustment and tilt\/tilt lock. Other functions include 360-degree swivel and tilt tension. Black, five-star nylon base is equipped with smooth-rolling, dual-wheeled casters for easy mobility. Weight capacity is 275 lb. Mid-back chair meets or exceeds BIFMA standards.