This Jemini Plus Deluxe Operator Chair has a high back for improved comfort and posture for up to 8 hours at your desk. The asynchro mechanism allows you to adjust the height of both the seat and back, with the angle either fixed or free floating. The padded seat and back are upholstered in charcoal fabric and the chair comes on a black plastic 5 castor base (an optional chrome base is available separately).