These Advantage mid-back black leather executive office chairs are an attractive solution for conference rooms and offices of all kinds.  Each ergonomic desk chair features a butterfly mechanism for easy adjustment in height and tilt, quality bonded leather, ergonomic back for added support and a waterfall seat edge for added comfort.  These swivel chairs also include a class 3 gas cylinder for simple seat height adjustment and they meet flame retardant standard CA117, comply with BIFMA standards, and are SGS tested and approved.