VIVA OFFICE Ergonomic Office Chair Executive Bonded Leather Computer chair High Back with Cushioned Seating, Black Deluxe high back bonded leather chair with extra thick padded headrest, lumbar support and seat, offering lasting comfort during long work hours Simple control handle adjusts seat height and positioning. Pull paddle up to raise or lower seat. Pull handle out to release tilt lock allowing seat to rock back and forth. Push handle back in to lock seat into desired tilt position Waterfall seat edge design reduces leg fatigue for lasting comfort High-quality nylon base and nylon castors for stable and silent movement Max weight capacity 250 lbs, easy to assemble, one-year free component exchange