Sonatec is an advanced new task chair designed exclusively for Boss by established designer Paul Brooks. Sonatec incorporates a unique height adjustable plastic J-bar which is a major development for Boss and sets new engineering standards for task chairs. The elegant design of the J-bar is unified with the contoured base, whilst the seat pan is generous in size to provide maximum comfort to the user. Sonatec's distinctive combination of advance technology, specialised control purposes and affordable parts has successfully pulled together to produce a sophisticated task chair with competitive pricing. Standard features include thoracic support, synchronised mechanism, 3 degree forward tilt, sliding seat, height and width adjustable arms, and a black nylon base, castors and frame. Options include: a painted, polished or RAL 9006 aluminium frame on black castors. A RAL 9006 or polished aluminium adjustable arm riser. Shukra lumbar pump. Multi-functional arms pads.