Boss Office Products Black Contemporary Ergonomic Adjustable Height Swivel Task Chair Commercial Flooring 5800 Material Aluminum Color Finish Family 5800 Material Aluminum Color Finish Family Silver Ventilation Type Exhaust Intake Exhaust Exhaust Wattage (watts) 420 Mounting Position Gable Mount Power Type Electric Powered Returnable 180 Day Drive Type Direct Drive Airflow (CFM) 3852 Amperage (amps) 3 Comes with both a round and flared end tube Upholstered in black heavy duty vinyl Upholstered in black durable vinyl Upright locking position Pneumatic gas lift seat height adjustment 25in chrome base Adjustable tilt tension control Dual wheel casters Black t arms Mas certified green ) 275 Adjustable Height Yes Package Quantity 1 Arms Fixed Folding No Massaging No Heated No Lumbar Support Yes Ergonomic Yes Casters Yes BIFMA ANSI Certified No CA Residents: Prop 65 Warning(s) No Swivel Yes Tilting Yes Arm Type Adjustable UNSPSC 56101500