Plexus Mesh Back Operator Chair - Vinyl Upholstered Seat, with firm padded seat upholstered in a range of vinyl colours, and robust square design mesh back with built in lumbar support. The chair features a seat-tilt mechanism with weight tension control, and 3D adjustable arms (height, pivoting pad and forward/backward adjustments). With a black nylon spider base, this chair is both functional and modern, and great value. Ideal for students and teachers.