auto-air features a self weighted Synchronised (Sync) mechanism suitable for a large range of users wanting an excellent ergonomic chair that they can actively recline back into to provide all day support. features: – five-year manufacturers warranty.– synchronised self-weighted mechanism.– high density seat foam.– adjustable lumbar support for the perfect back support.– stylish high arch spider base. upholstery:Priced in black house fabric / black mesh back Contact us for more information, a fabric sample or book a colour, design, ergonomic or space planning consultation. specifications: user: up to 135kg.mechanism: synchronised with tilt lock and seat slide. back type: mesh (black), adjustable lumbar.back size: 450w x 500h.seat type: fabric-covered high-density foam. seat size (large): 520w x 490d. seat height adjustment range: 450h to 520h. optional headrest. delivery: auto-air is supplied boxed ready for easy assembly. The lead time guide on this product is 5-7 working days.Please contact us for any assembly (if applicable), special placement instructions or if you have a trade project or fit-out enquiry.