Work Smart WorkSmart Black Contemporary Adjustable Height Swivel Drafting Chair Antique Brass Hardware The inverter module converts the 314846561 The inverter module converts the raw power from DC to AC output and Ceiling Mounts Contour self skinned urethane seat and back with built in lumbar support One touch pneumatic seat height adjustment Back height adjustment Adjustable footrest Heavy duty nylon base with dual wheel carpet casters Assembly is required Suitable for commercial use Collection Name WorkSmart Color Finish Family Black Manufacturer Color Finish Black Back Material Plastic Seat Material Plastic Frame Material Plastic Wood Species N A Finish Type Black Style Contemporary Trend Modern Type Drafting Number of Casters Wheels 5 Maximum Seat Height (Inches) 25