High back ergonomic operator chair complete with headrestCertified for 24hr usageTwist lumbar support on back with contoured seat with waterfall frontFeatures gas height adjustment and ratchet back height adjustmentAlso features seat and back tilt as well as seat slide to adjust seat depthSupplied with a black nylon base with easy glide castorsDeluxe Adjustable Arms in the traditional \"T-Shape\" are made from solid feeling black nylon, are height adjustable and are garnished with chrome detailAdjustable Arms in the classical \"T-Shape\" are made from solid feeling black nylon, are height adjustable and padded for extra arm rest reliefComplete with height adjustable arms or deluxe adjustable armsUpholstered in leather look black PU1 year warranty