The Teknik Office Ergo Twin Black fabric chair is our ideal solution for office use, easy to assemble and to operate, finished in a Mainline Plus fabric. It has a floating or fixed permanent contact backrest which also has a pronounced lumbar support, a height adjustable seat and a sturdy nylon base. The chair can be used for up to 8 hours per day. This accepts optional arms rests in fixed or height adjustable, all in all, a great chair for general office or home office use.