The Quanta office chair is a quality product for normal office use, with standard fittings such as height adjustment of seat and back, soft braking castors, and a synchro-mechanism that controls the adjustment of the the seat and back. The resistance in the mechanism can be set according to the weight of the user.As an optional extra, you can also fit the chair with height-adjustable armrests.The Quanta office chair is available in a choice of four colours: blue, green, red and grey.