Trexus Plus Matrix is a range that combines strength and durability with a distinctive and contemporary design. Permanent Contact Back mechanism allowing the back of the chair to be adjusted to the requirements of the user Optional arms available Seat WxDxH: 460x470x490-580mm Backrest height: 540mm 114kg/18 stone Use up to 8 hours per day, five days per week BS7176 Medium Hazard 3 year guarantee Blue