Many chairs have scuff resistant arched molded bases with matching casters, impact resistant outer back shells, adjustable height arms and headrests.All seating models come with easy-to-follow assembly instructions with detailed photographs making product assembly quick and simple.Features:- Luxhide Executive Chair- Attractive Black Luxhide upholstery with mock leather trim- Pneumatic seat height adjustment- Fixed height molded arms with padded armrests- Single position tilt lock with tilt tension adjustment- Scuff resistant arched molded base with twin wheel carpet casters.