The onyx chair is a contemporary office chair that offers a range of inspired features such as multi functional arms with height pivot adjustment and a contoured foam seat and back for extra support and comfortpatented productmultiple adjustments provide an accommodating seating experiencemulti functional arms with height and pivot adjustmentpolished chrome basecontoured foam seat and back for extra support and comfortgas lift tested up to 150kg measurements seat height ndash 480 580mmseat