The Teknik Office Ergo Plus Headrest Blue Fabric Executive Operator chair is one tough cookie. Certified for 24 hour use (BS 5459-2: 2000) and rated up to 24 stone, you won't get a hardier contract chair for call centres, operation hubs and a variety of other office environments. It's available in Blue or Black padded fabric and has optional extras such as arms (fixed or height adjustable) or different forms of five star base (premier aluminium pyramid base, ultra nylon pyramid or plus standard nylon) or you can opt for the non headrest version of this chair (9600) The possibilities of customising this chair for your customer are many! Other features include an anti-shock function, 2:1 back and seat syncron (5 position) , 4 position seat slide, lumbar and ratchet back height adjustment on backrest and gas lift seat height adjustment. So many features!