High Back Asynchronous Chair. Classic range if the most popular operator chair types for general office use that gives you just that little bit extra. Quality, affordable, hardwearing fabric favoured on many lines. 100% Pyratex, 60000 rubs. Bs 7176: 1995 Direct Test for Medium Hazard premises. PYRA fabrics are suitable for use in premises categorised as Medium Hazard.. BS EN 1021 - 1&2: 1994. BS 5852 Section 4, NI5 (passes cigarette and match ignition source 5). UNI 9175/87 - Class M1 Note. Tested by FIRA to meet BS EN1335: (2000): Part 2 for strength, safety and stability. Computer or at-desk tasks are part of work, typically 7-8 hours a day. Ideal for secretarial, word processing, clerical, professional and accountancy jobs. Up to 18 stone/114kg. Asynchro movement allows you to move the seat back to any position you choose, to maximise comfort. Users can adjust height of seat to maximise support for legs. Optional fixed arms, Height-adjustable arms and De Luxe Height-adjustable arms available. Seat WxDxH: 460x450x480-590mm. Backrest Height: 520mm. Colour Red.