Our chair advantages: *High quality accessaries all past the BIFMA test, Iron or aluminium alloy frame ,arms , bases hand-buffed to a mirror finish, lasting 10minutes during the chrome process make chrome layer more durable. *All design are ergonomic , comfortable for you to sit with postures you perfer, they promote blood circulation and what more, they can help eliminate your fatiture and lighten burden at your waist, your health image will be continuously maintained.